Gen-II Secondary Air Injection Bypass Module - 2007-2021 Tundra 5.7L- Hewitt Technologies
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- Опубликовано: 3 авг 2024
- Installation and discussion of the Hewitt Technology Inc.'s Gen 2 Secondary Air Injection System Bypass Kit. In this video we install the Gen 2 kit on a 20008 5.7L Tundra. Even though we are installing this on an 08 Tundra for the video the it is applicable to and the installation will be the same for all 2007 and newer 5.7L vehicles including the Sequoia, Landcruiser and LX570 up to the last year of the 5.7L, 2021.
The Gen 2 Kits and others can be found on our Hewitt-Tech.com website here:
hewitt-tech.com/product/secon...
The Gen 2 kit is the most comprehensive solution for a failed secondary air injection system to date. It is the required solution for any of the Flex Fuel vehicles and all of the 2014 and newer Toyota/Lexus vehicle or earlier vehicles that will run the system on engine shutdown.
The kit includes the Gen 2 Bypass Module, a pair of exhaust block off plates, a custom harness, a full color copy of instructions, our Expert Technical Support and a Limited Lifetime Warranty.
This kit will take care of all the normal mechanical secondary air trouble codes like P2440, P2441, P2442, P2443, P2445, P2447 but also take care of electrical fault codes like P0418, P0419, P0412, P0415, P1613 and P1614 that our older Gen-I kits need kit addons to take care of.
Unlike our previous V3 and V5 units, the Gen-II unit let's the ECM think the entire secondary air injection system is operating like it should and the emissions monitor will show as complete the next time the systems is commanded to operate. The Gen-II Kit takes the place of the factory air injection control drivers and communicates directly with the ECM. The only parts of the system that is required to remain are the pressure sensors in the air switching valves. If those have been damaged by exhaust or you want to remove the valves they can be replaced by adding Pressure Sensor Options to the kit. Those can be found here: hewitt-tech.com/product/kit-a...
Currently the Gen-II kits are available for ALL 2.7L, 4.0L, 4.6L, 4.7L and 5.7L engines in the Tacoma, Tundra, Sequoia, 4runner, Landcruiser, LX470, GX470, GX460 and LX570. We also cover the Prado and Hilux vehicles for our friends in the down under and other markets.
If you have any questions or would like to order, please give us a call Toll-Free 844-307-7671 or email support@hewitt-tech.com You can find all of our products and more information at hewitt-tech.com
Disclaimer: It is illegal to remove, dismantle or otherwise cause to be inoperative any pollution control device required by federal, state, or local emissions law. Our bypass kits are sold for off-road, competition or other emissions exempt use only. No other applications are intended or implied. By installing or using this SAIS Bypass Kit the vehicle owner and installer acknowledge and assumes ALL risks associated with its use.
* Update* The blank plug caps are now shipping with the units. Use the blank plug caps instead of just taping off the connectors. It is also recommended to remove both factory air injection control drivers so there are no open and unused connection points. 
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Installed the Gen 2 kit in my 2013 Tacoma. Couldn't be easier. The trick of going through the wheel well was awesome. The truck is running better than ever! Your Customer service rocks!
Thank you for your support and feedback! This is why we do what we do.
These guys are the real deal, this kit works 100% love the OEM look. And the kit now comes with the plastic caps for the 2 plugs that are no longer needed.
Had to install a bypass about two years ago and it’s still working like a champ. Hewitt Tech saved me tons of money to fix a known problem that Toyota half ass handled.
I ordered the Gen II kit and was at my door in less than a week. I live in north western Canada. Thank you for the prompt shipping!
Installed the unit today and it was a bit of a struggle to get the passenger side connection off but all in all very straight forward. Great video and instructions that came with your product. Thanks again from the Great White North.
Always Great to hear! Thanks for the Feedback and let us know if we can help with anything else.
I just did this on my 2010 4.6 Tundra. The kit arrived a day early and the instructions were phenomenal. Took me about 90 minutes with harness and block off plates. I wish all businesses put this much detail and energy in their products. Thank you.
Tommy, thank you very much for taking the time to leave your feedback... we are constantly looking for ways to improve.
Can I ask what did your truck do? Before you installed the kit?
@@Hewitt-tech hello sir my truck having some problems a guy told me to get these kit will
It work?
@@rodoaguilar4804 Please contact us directly with your trouble codes. You can give us a call toll free during our normal phone hours 8AM-5PM EST 1-844-307-7671 or send an email to support@hewitt-tech.com and we would be glad to see if we can help.
@@Hewitt-tech I have a 2012 toyota tundra 4.6 v8 I have a c1201 code and a p0419 code
I just installed this kit on my 2012 Toyota Tundra 4.6L. It did the trick!
The switching valves are in the engine bay rather than under the wheels for my truck. Loosening the bolts on the switching valves for the block plates installation, especially the one near the air filter, were the toughest parts of the install for me. All in all it probably took me 3.5 hr - I’m mechanically inclined but more on the home improvement side of things.
Very happy with the product, so far. I really hope it holds up over time. Thank you, Hewitt
Just installed mine!!! Couldn't have been any easier!! Thank you Hewitt!! Instructions and photos were incredibly clear. I feel like I have a new truck!! You guys rock!!!
Will it pass California smog after bypass?
4 real man do this kit really work,, my 2012 tundra engine, 4 Lo, Trac light keep coming on
Customer service with Hewitt tech is second to none. These guys are the best.
Caleb, thank you!
Just finished this installation. It did the job. No warning lights and no limp mode, my truck is now running great. Thank you so much. 08 Sequoia.
Put my Gen 1 kit on- 05 Toyota Sequoia- running better than ever. Very happy.
Installed my Gen 2 kit yesterday on my wife's 2012 Tundra. What a lifesaver it is. I was not going to pay $3000 plus for a system that I'm sure would have just gone out again. Thank you Hewitt Tech for the great product, and for also answering the phone when I called. The person I spoke with was outstanding and very knowledgeable about the product.
Thank you for taking the time to leave your comment and feedback!
I bought a Gen II SAIS kit and a PSO for my 2007 Tundra from Hewitt Tech February of 2021 and just made time to do the install in Jan 2022. I'm not terribly mechanically savy but Paul's system and instructions made the installation a breeze. The components are high quality; the installation instructions include photos of critical steps and are easy to follow. I would recommend this solution for any Tundra owner that is facing Secondary Air Injection System failure, it is an excellent fix with top-of-the-line support.
Is your tundra still running well?
@@jondavis2206 I haven’t had any trouble since the install. No warning codes or power issues. I use my truck for my business up here in Alaska so I feel like if there were going to be any lingering issues, they would have been apparent by now. I have no reservations recommending this kit to fellow Tundra owners.
My 2008 toyota tundra 4.7l is now running smoothly and out of limp mode. The kit truely is plug and play and the blocking plates were easy to put in from the top not the wheel well on my truck. excellent instructions, and the customer service was also excellent answering my questions prior to my purchase as well. would definitely recommend it to anyone with a tundra having those SAIS engine code problems. Thanks.
Is there step by step instructions with the part when you receive it?
Sorry for the delay hope u got it fixed... The instructions are awesome if u still are considering it and there are videos on RUclips as you know
2008 tundra 5.7
Just had my full kit installed, did the install myself. It went smooth overall, even though there are tight spaces and hard to get to spots, helps being tall with long arms and big hands 😊
The CEL went off right after, with out having to plugging in the code reader and erasing codes. Truck passed emissions with no problems.
Huge Thank you! to Paul Hewitt and his team for developing a great product that works, it’s definitely worth the money invested to keep our trucks on the road.
Thanks for taking the time leave a comment and really appreciate the kind words. Glad we were able to get your Tundra back on the road and out of Limp Mode. Please let us know if there is anything else we can assist with.
Installed mine on a 4.6L tundra. Works fantastic!
Put my Gen 2 kit on today. And 2007 Tundra 4.7 runs better than ever! Thanks alo Guys!!
Did you follow this video? Was it the same for the 4.7 or did you follow instructions included? Looking to do the same with my 2007 4.7
@@supereddieeit’s easier on the 4.7L 2007 the air switching valves are on the valve covers and not on the rear of the engine like the 5.7L
@@SeahawkAz yeah it was pretty easy, already installed and sold the truck by now lol
Installed mine .on 2007 5.7 tundra took me about 2 hours,im 65 years old with bad knees and bad back got son inlaw to do back plugs,he had skinner arms
Installed a week ago and no more codes or limp mode on my 2008 5.7 w 187k. I was getting the P2443 codes for both banks - stuck closed. Took me a while to get the passenger plug undone, and the block off plates were easier than expected. Worth it!
Which one did you order gen1 or 2 ? Which one is required for which? Ty
Good morning,,quick question my 4lo,engine ,trac ,light all comes on do u think this bypass kit will make them go out
@@matthewwatkins1156 It may - if you don't have a code reader, an auto parts store will usually scan for free and give you the codes that are causing the faults. Check that first - mine was P2443, and this kit fixed it.
I installed the Gen-II on my 2011 Tundra 4.6L with relative ease and it only took two hours. Hewitt's RUclips videos helped immensely, plus a couple of others I found demonstrating the installation process.
The CEL came back on shortly after installation of the bypass kit. I emailed Hewitt support and the owner replied immediately. That in itself spoke volumes to me about this company! Mr. Hewitt suggested I install the optional pressure sensor on Bank 1 to see if it would resolve the codes I was getting. I was impressed that he did not try to convince me into buying a pressure sensor for Bank 2 unless I truly needed it. Turns out I did indeed need the second pressure sensor which took all of one minute to install. Since then, my truck has been running like a champ!
Finally, each time I placed an order I paid for overnight shipping from their location in SC to Dallas, TX and the part was sitting on my doorstep by 9:00 AM the next day. Again, great customer service. I highly recommend this company and their products!
Ordered the kit for my 2012 Toyota Tundra, 4.6. The product arrived on time and was easy to install. I had to make several calls for tech support. The support was awesome! I can't express how responsive, patience and knowledgeable the support staff is. Derek was the technician who assisted me. Derek was awesome and provided amazing support. I and my Tundra are grateful for Hewitt and Derek. We are "On the Road Again." Thanks guys.
It is comments like these that make Monday Mornings worth it. Hewitt is truly here to help and take pride in our customer service. Glad we were able to get you back on the road and really appreciate you sharing your experience. If there is anything thing else we can assist with please do not hesitate to contact us.
What an amazing product and company to work with. The GEN 2 kit is fool proof and very easy to install and works as advertised. 10/10 would recommend Hewitt to anyone.
Thank you for the feedback. Please let us know if we can help with anything in the future.
Mine has been on two years and working great!
Just installed my kit yesterday, very good customer service, instructions with pictures, and helpful videos too. They were not kidding about getting the clips off between the engine and firewall on the 5.7 L Everything else was easy, sprayed down the flange bolts a couple times 2 days before and they came off very easily. But the clips gave me some issues, ended up using tiny screw drivers to pry the clip up for removal. Good service and tech support overall!
Always good to hear. Yep, unfortunately on the 5.7l it can be a little tricky getting to the connectors. It is still way better than having to remove the intake manifold and replacing everything. If we can help with anything else just let us know.
@@Hewitt-tech absolutely not even a question about it, why replace the parts when they will just fail again.. I was making a simple pointer for anyone looking to DIY this project, I had issues because it was my first time, if I had to do it today it would be a lot easier.. just trying to help people with a small tip beforehand, thanks again!
@@KurtBraunel Exactly. It would be nice if the 5.7L was as easy as the other engines but unfortunately that is just what has to be done to make it plug and play. Cheers!
Hopefully a helpful hint. Installed my Gen. 2 on an 07 tundra 5.7. I did the passenger clip from the driver's side reaching behind engine. Much easier. Check engine light is off and transmission shifts properly...
I have had my bypass kit for my 2005 Tundra 4.7 for about 4 years now and it is still working great. I was having some issues with my truck that i could not figure out. I contacted Hewitt-Tech asking if maybe the issue could be with the kit. After checking it and found out it was in good working order they kept emailing me until i found the problem. They went above and beyond to help me. Awesome people that still care about others.
Was your problem related to the mass airflow sensor?
I just completed my 2010 Toyota Sequoia 5.7L. The product worked great! I found the video(s) most helpful as I'm an amateur mechanic. My son will be installing it for his 2007 Toyota Tundra 5.7L as well. Thank you!
Do you mind explaining to me what this is for ? Is it for the air suspension vehicles ? I'm looking at replacing a rear air bag/shock on a 2008 Sequoia Platinum and I starting to think maybe I should do the coil conversion. Is this all related ?
@@rj8296 My vehicle went into "limp mode" and this bypass eliminates that problem. FYI, I'm planning the coil conversion too but I don't think it's related to this problem. I'm replacing the air suspension because I'm hauling trailers and need the added support.
@@davidscott9466 from everything I’ve read air bags are far superior when hauling, that’s why Semi Trucks have them. I ordered new air bags for mine.
@@rj8296 that may be true for semi tractor-trailers, I wonder why Tundras don't come with the airbag suspensions. Sequoias are essentially on Tundra frames.
@@davidscott9466 They actually do have the air ride option in the newer models. Many people that tow heavy campers add them using aftermarket companies.
My 2008 Toyota tundra was giving me trouble codes I called a local dealer and they told me it would cost me upwards of 4500$ so I started looking and I found the Gen2. I want to thank you I installed the Gen 2 and an add-on on Dec 22 and up to now it's been working great. it took me about 1 hour to do but I did have a little trouble with the blocking plates which I overcame.
Thanks again
Great news and we really appreciate you leaving a comment. There is nothing better then getting Tundras back on the road and money in your pocket! If there is anything else we can assist with please do not hesitate to contact us.
Completed this on my Tundra and couldn’t be happier!
@coachcrawmer5229 Thanks for leaving a comment. We know we have done our job when customers are happy and trucks are running!
I had to replace the passenger side pump on my 07 4.7 tundra a few years back. Cost me about $400 doing it myself. Didn’t know anything about Hewitt back then and didn’t know the problem could reoccur because of terrible design by Toyota. Got another code for a pressure sensor (p2438) this week and went into limp mode. Got the double sensor harness bypass and SAIS bypass (gen 1). Putting the harnesses on and fishing the starter relay took all of 10 minutes. The exhaust block off took about an hour just because of the tight space on the passenger pump. Cleared the codes and now it runs like a top. It’s a bummer a company like Hewitt had to fix a significant issue from Toyota….
Kudos to Hewitt. I highly recommend them if you have any problems with your SAIS or AIP…whatever the acronym is :)
John you know what they say, "necessity is the mother of invention". I agree it is unfortunate the failure prone SAIS has not been addressed but Hewitt Tech is happy to meet the need with a comprehensive solution and affordable solution. Thanks again for taking the time to leave a comment and review. Give us a call if there is anything else we can assist with.
just installed mine on my '12 tacoma V6. easy and straight forward. Thanks
Best customer service EVER!! I got one for my 2008 4runner. It works perfect. A month after I installed it my car threw another code and I thought it had gone bad. I call Hewitt and they diagnosed the codes over the phone. The technician said it was probably my gas cap. I looked at my gas cap and sure enough my gas cap was loose. I tightened my cap and all is well. Saved me a trip to the auto shop!!
Hewitt is here to help! Glad we were able to add value in the troubleshooting process and if there is anything else we can assist with please do not hesitate to contact us.
How can I talk to him I changed my pumps and now the random misfire is worse than before
Did this on my 2008 , the support was top notch. I am a long armed tall human so i had to improvise to get to the passenger side clip after trying the whole lay on top the engine. took a few hours to figure out. If you do not have a young small young person to do the passenger clip.
So the 10mm bolt holding a small harness on top of the intake manifold once you remove it you can see the clip. to get to it the easiest way was to unclip the main harness from body on the passenger side, then there is a 2nd clip that is holding onto the engine via a 10mm bold. Once both are removed . You can push the harness around and reach the clip from the passanger side with no issue. I used small nose plier to push the tab down and pull. The harness clips are one one where you stick your small flat head screw driver and just pull. they are strong and they will clip back. Even if not its not a big issue, the 2nd clip is held in place with a 10mm which is easier to remove the bolt.
Might help someone as this if know would take you 10 minutes to do the passenger side. the driver side is easy.
The block off bolts were completely rusted so ended up getting a pdf from heweitt with some solution that i gave to my mechanic who charged me 100$ to get this done, If our pump is stuck open then this is needed to clear the error.
Put 1000 miles in the July 4th weekend and got 2 mpg more than usual and it runs with alot pep. Smooth. Being a 2008 mine is out of the age for emission . i also got some gas smell in the cab which has disappeared
After Seeing p2442 code and multiple limp mode incidents on my 2008 5.7L Tundra. Was told by Toyota dealer I needed a $2,995 repair to fix the errors. I Installed the Gen1 bypass tonight and so far seems to be back to normal operation. Thank you!!!!!
Hello, any update on how it’s going? Mine came on, on my 2013 5.7v8 Tundra
@@h.317 mine just came on 2011 4.7 v8. gonna get one and hope it doesn't lead to issues down the road
My 2013 Tundra hit 119,000 miles.
The engine light went off leaving the house.
It got into limp mode, I drove it back to my house.
Put the scanner & it was P2445 code tho.
I deleted the code, and drove it around for a day & it came back on.
So I will take it to a mechanic to get a full inspection & and see what the cost will be.
@@h.317 its gonna cost 2000-3000 unless you bypass
@@stinkylittlerascal actually my code is p2445??
After going to two different mechanics because I got a PO419 code in my 2010 4.6L Tundra and was told by both I needed 2 new air pumps from Toyota only! I started researching alternatives. I found Hewitt-tech Gen-2 bypass a cheaper solution. I’m 79 years old and the biggest problem I had installing was separating the electrical connections. I thought putting the block off plates between the ASV and the air tubes was going to be difficult but once I found the bolts to remove from the air tube brackets and gently with a 10mm wrench loosened the flange bolts I was able to breath! Everything else was easy and once I tidied up with zip ties reconnected the negative cable to the battery I crossed my fingers and started the truck which immediately died(normal) after restarting the engine light was gone and I drove it around the neighborhood. All is good and when I had questions I emailed them to support with pictures and got a response right away. What was even scarier after was thinking about those mechanics I took my truck to and how much it was going to cost me if the air pumps did not fix the problem because there are other pieces to this puzzle as simple as a corroded terminal in one of the connectors. Great money saving product with helpful people Thanks Hewitt-tech.
Jack we really appreciate you sharing your experience and glad you found us. Your right it is scary to think you could have spent $$$$ repairs and may not have fixed the issue. Aftermarket components are trash and we have even seen customer go through 2 - 3 sets of Factory/OEM equipment before they find us. If there is anything else we can assist with do not hesitate to reach out.
Installed this on my 4.6 tundra with the pressure sensor add ons. Worth every penny and installation was a breeze. $5000 was the quote I got (definitely high balling) for the entire system rebuild. No brainer, the bypass kit is the way to go and they ship so fast, even back ordered parts were only an extra 2 days. They stay on top and stand behind their products.
Thank for your your comment and feedback!
So your sensors were bad? I have a 4.6 just had the Gen 2 kit installed and it has not fixed the issue. Maybe need the sensor add-on? Did you get a code from your reader that the sensor was bad? I have not.
I was planning to have a shop install this kit for me but when package arrived and I saw how in depth the instructions were (including color photos) I decided to do it myself. Overall was very easy, installing the block off plates on my Lexus gx 470 was the hardest part. Highly recommend Hewitt technologies
Eric thanks for taking the time to leave a comment, we greatly appreciate it. Glad installation when well for you and decided to give it a shot yourself. If there is anything else we can assist with please let us know.
Just installed Gen II on my 2011 Tundra with 4.6L Engine. Took 2.5hrs. Rusted bolts under brackets holding AIDs slowed me way down. I sheared the heads off of 2 of them, can't believe those bolts extend into the wheel well exposed to salt. My bracket is held on with 1 bolt and a few attachments to wiring harness clips. Will need to get them drilled out in the future. Backoff plates required loosening all three 12mm bolts holding the ASVs on the engine block. Once the ASV is loose, you can open up a gap just big enough for the block off plates to install. First start of the engine was a success, we will see how this goes after a few cold overnights but so far...very impressed.
Ahh... yes, I have run into trouble with the fender bolts before. I know this doesn't help now but may help someone else, if you hit the exposed threads really well with a wire brush/wheel and some penetrating oil it will help a lot in removing them. Drilling through or grinding the weld nut off and usign a stainless bolt with the nut on the topside would work well for that. On the 4.6L there is that one clamp that holds the air tube down to the top of the valve cover. We found it easiest to We found it easiest to just remove that bolt and carefully pry between the back of the cylinder and the air tube to open that gap. Loosening the air valve is a good and will help give you some more room as well. Getting the ASV bolted back down with the plate installed is a lot trickier if you remove the bolts holding down the ASV.
Glad you were able to get it all installed without too much trouble though and that it is working.
If you need anything just let us know.
Paul
I have run the truck over the last week and …oh my god…best thing I have ever done to any vehicle.
@@ShermNE Really appreciate you taking the time to leave a comment. If there is anything else we can assist with please do not hesitate to contact us.
Long story short... I was on a 5300 mile trip and 800 miles in Im stuck in New Mexico with a harley in bed of truck and a camp trailer in tow... Limp in mode on hwy with 80 mph speed limit and Im in limp in mode! After limping to Rio Rancho NM this great company was able to next day air ship this to me so I could put it on in a parking lot! SAVED MY ENTIRE TRIP!!!! I cant thank you all enough! After install no more light issues and I was able to drive like a mad man to catch up with my trip! WELL DONE MY FRIENDS!
@markgardner8542 This makes our heart sing! I am glad you found Hewitt Technologies and were able to deliver in a time of need. If there is anything else we can assist with please do not hesitate to contact us. We could also greatly appreciate if you could share this review on our google business page. g.page/r/CYkk2OeC9CgvEAg/review
Just completed the install on my 2008 5.7 Tundra. As advertised the Passenger Side plug is a bear. I used a hand mirror to visualize the plug and went from the front... just couldn't do it. Son in law has smaller hands and he did it in like 30 seconds. I believe Mr. Hewitt's small frame skinny arms tech in the video is on the passenger side in the demo for a reason lol! I had previously bought the competitors (Ruitech) unit and installed but it failed after a year and went again into limp mode. After emailing Tim (owner) he sent back that they didn't sell their units for 2008 5.7s as it would inevitably fail (his words). Maybe it was my mistake but I usually don't mess up with something like the year model on my truck... anyway I'm glad I finally went with the Gen II and pressure sensor and my truck is running great at 350K miles.
We try to make people aware of the difficulty in getting to those connectors for sure. We don't try to sugar coat it. And you are absolutely correct about why I wasn't on the top of the engine...my guy was a former Toyota tech and had hands half the size of mine.
Glad everything worked for you! Let us know if you need anything. Paul
I think you meant “drop a screw” and the nut goes on the back of the screw. Now ya know. Thank you for the video- i needed this!
Sweet GX470 in the background!
Thanks. I needed to get back in a 4.7l to develop the GenII-3V kit (specific to that style 4.7L). I had to completely rebuild the suspension and driveline. It still needs some work but so far is my favorite of the 4.7L Toyota/Lexus vehicles I have owned. I wish I could have bought one new.
I CANNOT recommend Hewitt ENOUGH!!!! After my check engine light came on and my 2011 Tundra and it went into limp mode I was PISSED! The truck has NEVER been repaired and the 1st problem is EMISSIONS! Even better when the dealer quoted OVER $3K! I ordered the Gen 2 module and harness, installed it, but still dead. I contacted Hewitt and they suggested ordering the sensors. installed still DEAD!!! Now I'm really losing it! I talked to a tech at Hewitt and he helped me diagnose a BROKEN wire on one of my connectors....Ordered a new connector and pigtail and BOOM! Up and RUNNING!!!! They allowed me to return the sensors and in my OPINION have shown what AMERICAN COMPANIES Customer Service SHOULD BE!!!!!! THANK YOU SO MUCH!!!
Gen II installed on 06 Tundra after a lot of info from the Hewitt Tech. After install the issue was gone & passed emissions. Finally!
Glad you found Hewitt Tech and that we could help end your SAIS issues. Thanks for your comment and if there is any value we can add in the future do not hesitate to contact us.
If there was a magic wand for SAIS repairs, it would be named after Hewitt Technologies. I installed the Gen-II SAIS Bypass and both Pressure Sensor Options (both PSOs due to a bad air switching valve on my 2008 Tundra 5.7L) and it wasn't that difficult with their detailed instructions. As soon as I started the truck the check engine light was off and out of limp mode!
Just installed the gen-11 kit on a 2010 tundra, had replaced the switching valves with Dorman brand from Rock auto, one of them only lasted a week, installed the kit and still could not cancel one code, put old valves back in and all seems good. Pulling the intake is not a big deal if one has trouble getting at the switching valve connections.
It was a good call trying your factory valves to see if their pressure sensors were still good! We have recommended trying that on other engines than the 5.7L because the valves are easier to change on them. We typically recommend our pressure sensor addons to save having to replace the valves on any of the engines. The Gen2 must use an actual pressure sensor for each valve while the Gen1 kits we can use just a jumper harness or a harness with a pressure sensor if both are bad. Just let us know if you need anything else. Paul
In response to a P2443 code, I installed Hewitt's Gen 2 Bypass Kit in my 2007 Tundra a couple of weeks ago and fixed the problem. Spray the bolts in the wheel well several times during the evening where you install the block plates and let them sit overnight, and loosened mine in the morning, no problem. And I'm in the rust belt and my truck is 16 years old. Regarding the two final electrical connections at the rear of the motor, Practice undoing on the new ones that comes with the kit, or practice on the one mounted on your air cleaner housing. Put a trouble light back there because if you can get a visual on it, it really helps. The drivers side is easier to access and depress, it's sitting right at the corner. If you have trouble depressing the clip, my thumb's kind of fat and wide so I taped a one inch long piece of very small dowelling up the centre of my thumb, a little piece of a twig off a tree would work fine. The passenger side, I threw a cushion down and climbed up there and I could barely see the clip past the wiring harness, but good enough to get a dental pick on it with my right hand, lift the locking clip just high enough to clear, and with my left hand in place and my fingertips just able to grab the connector, pull it apart...and Bob's your Uncle! Then hooking up the kit connectors is easy and away you go! Tech support is outstanding if you need help!
To a T my good sir. We really appreciate you writing about your experience installing the HT Bypass Kit. Particularly the 5.7L can have its challenges. I could not agree more with your use of penetrating oil and liked your tips about depressing the tabs on the connectors along the fire wall. Where there is a will there is a way!
Something I did that seemed to help a bit was I took the driver side front tire off and lowered the entire front end so I could reach the back of the engine much easier. I then laid some floor mats across the top of the radiator and engine to be more comfortable
Travis great idea and I bet did help with accessing the Air Switching Valves! Also, good call on the floor mats. The process can get pretty involved every little bit helps when diving into the engine bay.
On the 2008 5.7 , if you remove the wiring harness bracket on the firewall passenger side it gives you a little more Room for your hand. Other than that it’s all by feel. Just got mine installed and so far it works good
Yes! It certainly helps which is why we mention this in the instructions.
I just completed installing this on my 2012 sequoia with the 5.7 engine. Gotta say the connection to the driver's side pump was extremely hard and did not go like the video. I found it helped removing the line he said but also i loosened the holders for the main wiring harness which was really hindering me from getting my hand on the clip. My clip was very hard to depress probably due to age. For the passenger side i used a picc and screwdriver to disconnect the wires. The picc raised the retaining clip and flat head pushed it off. The wifes little hand helped connect hewitts connection to the valve. I also got the caps installed (driver side was worst) and so far so good. No codes and shes running fine.
@ryanv7195 We really appreciate you taking the time to share your install experience. Each vehicle can provide different challenges and the more feedback there is the better it is for the community. What you described is not uncommon but loosening up the bolt and main harness does give you a little more wiggle room when installing. I think your wife is the real MVP and glad the truck is back up and running without any error codes. If there is anything else we can assist with please do not hesitate to contact us.
Just ordered yout kit for my 2008 Sequoia. read through a lot of forums, so hope it works out.
Please give us a call for a consultation and we can help make sure you get everything you may need from the start. Toll Free 1-844-307-7671
@@Hewitt-tech Getting the plugs off are a challenge...still working on trying to get the passenger side off...will try again in an hour...
Got the connectors installled...Now off to doing the blocking plate...
@@saturnfire I am glad you were able to get them done. They certainly can be especially the passenger side. I wish there was one trick that I could recommend that would work for everyone.
I try to lay the tip of a small flat head on the tab and use your thumb to depress the tab. Then if you can a long flat head can be used to catch the edge of the connector and carefully pry to help pull the connector off. The most important thing is just to be careful not to damage the wiring or connector.
Suggestion: Until you get the connector block off plug solution worked out, if you are just going to tape off that connector, pack it with dielectric grease first. That will make sure that no moisture forms inside and starts corroding it.
*UPDATE the plug blanks are shipping with the kits.*
Hey Remy, The plug molds are in production. The grease is a good suggestion if anyone ever thinks they may go back to using the SAIS. You for sure don't want corrosion on them if you need to use it again for whatever reason, prevention and then sale is what I would think. From our point of view we just wanted to make sure no one was arc welding anything. Anyone who has disconnected the positive battery terminal and touched the wrench to anything knows what I am talking about. Thanks for commenting!
*UPDATE the plug blanks are shipping with the kits.*
@Hewitt-Tech Are the molded plugs for when you unplug those oem air switching valves?
Toyota would not honor the warranty to replace the SAIS in my 2012 Tacoma 4.0L because it was Rebuilt, and wanted over $2k to fix it. I could have ordered the part and replaced it myself probably, but it still was going to be over $500, and this was going to be the first time fixing something with the engine myself. AND I read reviews that part goes bad every 10k miles or so in ‘12 Tacomas because of bad design, so I decided to take my chances with the SAIS Bypass kit instead.
Yes, yes, and yes. It paid off. It was not easy for me to figure out where everything had to connect to (it took me several hours overall), but once figured out, you’ll realize it wasn’t that difficult. The exhaust plates that come with the package are identical, but I came to learn that one of the SAIS ports in my vehicle was modified because that side was where it was rebuilt. All I had to do was get a metal file and grind one of the plates down a little to make it fit, tighten it back on, done.
With the 2012 model you also may not need to install the purple relay wire they give you, but just follow the directions included in the package, and Customer Support will let you know if that’s the case. They were as quick and helpful as advertised. If you have any questions or problems, just contact them however you like. I cleared the CEL codes by disconnecting the battery, and have been running it for over three weeks now. No limp-mode, starts beautifully, runs great. Saved me big $$$ and I never have to worry about the part again. Thank you!
Hey Andrew, Glad you got it all figured out, thanks for the feedback. Just so people don't get confused, you got one of our Gen-1 V54H kits, not a Gen-II kit shown in this video. The Gen-II would have been a much easier option for your 4.0L Tacoma than the V54H. The V54H kit connects to your MAF sensor and ECT sensor which on the Tacoma 4.0L is a trick to get to down the back of the engine. The Gen-II unit install on your would have taken 10-15 min..it replaces the air injection driver like in this video but plugs into both your air switching valves which are right there in the open on the passenger side of the engine. Just let us know if we can help with anything else. Thanks, Paul
Just installed mine in my 2012 Takoma, unfortunately, it does not work. The check engine light comes on right after turning the truck on, and that's right after clearing the code. I will call their customer service tomorrow and hope they can help me figure out the problem
@@sergiocabal8233 customer service was patient and helpful with me. hope it works out for you.
It's a damn rip off just by the replacement parts and fix it yourself you'll thankk yourself in the end
Just got p2440 code for bank one valve stuck open. Debating which is better to bypass or just replace both valves. Truck won't accelerate, filly. Is this OK to drive as well, no stalling issues? Just accelerating. 4.6 v8 2011 tundra
Installed yesterday. Check engine went away right away. Finished the block off plates today. When doing the bypass module, only hard part was reaching back of engine. Used a mirror on handle to visualize where the plugs needed to go.
Will it pass california smog after bypassing?
Installed this kit on my 09 5.7L Tundra before I had any issues and so far works fine. This was a challenge but doable. What helped was taking off the front wheels ( you will need to do this anyway to install the block-off plates) and lower the front end down for easier access to the air switching valves. Use one of the tires to stand on instead of a plastic slip and slide step stool to stand on. To remove the switching valve (made in hell) connectors, I had a very small flat bladed screwdriver 1 1/2" length with a shank 3/4" long with a dia. .075 (a little over 1/6"). A nail would probably work. Insert this in the top hole back of the connector to override the latch. Now you can focus on the connector body without damaging the wires in the process. Practice this with the connector on the airbox (same one used on the valves). Hope this helps.
Just got done with the install. It's gonna a take 500 tries for some of us to unplug the 2 wires behind the manifold but don't give up. It will work. Put on knee protection and go up over the engine and feel your way around the plug cause you can't see it and need to feel your way around it. *** the hardest part was separating the flanges to put in the blocking plate. I spent hours until I got a floor jack and jacked up the stick that was pushing on the stud. The trick was to have the middle of the stick backed into break/disk so when I jack it up it won't pop off or push the jack back. Use hard wood cause I pushed it almost to breaking point.
Yeah this is kicking my tail in doing the wires in the back
I have been trying to get the harness connections undone on the AVS for over an hour.
The 1 hour install estimate is very optimistic, the passenger side is very difficult to reach if you have large hands. I’m probably going to have to remove and or move a lot more of the factory main wiring harness anchors to get at the bank 2 ASV connection.
Sorry you are having or had a hard time with the connectors. The passenger side in particular on the 5.7L certainly can be difficult, even for an experienced mech/tech. Unfortunately, it is what it is which is why we warn about it in the video and instructions and point out some things you can remove and unbolt to get a little more room. No sugarcoating there.
A topside creeper or placing several layers of cardboard on top of the engine bay you can lay on helps a lot so you don't have to support yourself with your hands.
I find laying the tip of a small flat headed screwdriver on top of the tab really helps depress the locking tab and makes it easier to pull the connectors off. You can also use a long screwdriver or blunt punch/ round file to depress the tab and use long reach needle nose pliers or another long screwdriver to catch the side lip of the connector to push-pull the connector off.
Just be really careful not to damage the wiring.
If we can help with anything just give us a call.
After installing this kit, is there any problems with removing the two air pumps under the front passeneger fender? Just to clean up the engine bay a little?
With the Gen2 kit installed the air pumps can be removed. They are disconnected at the air injection control driver and their connectors capped off at the Gen2 unit.
would I need this kit or the first gen for my 05 4.7 Sequoia to eliminate all sensors and future codes?
The GenII is the recommended solution that covers the most codes and eliminates as much of the system as possible. With the GenII unit only the pressure sensor(s) in the system need to remain and be undamaged. Wirh the GenII they are the only thing that would need a kit addon to replace them if they were damaged.
So you only have to replace the bank 2 module? I have a p2442 code in my 08 tundra 5.7. Thanks
Both air injection control drivers are replaced with one GenII unit. In the video I just left one of the air injection control drivers in place so the big 2 wire connecton could remain connected to it and be safe instead of taping off both off them. Now they come with our custom blank plug caps so instead of taping either off or leaving one connected you remove both air injection control drivers and put the blank plugs in both big 2 wire connectors.
Paul when you found that corroded connection during the installation of the Gen 2 kit I can only imagine what it would have cost $$$$$ the owner of that vehicle after the mechanics changed both air pumps, the relay, any fuses etc; and everything else they could think of and still not have found the problem.
Hey guys, 08 Toyota tundra 5.7 120k throwing P2442 code, truck in limp mode. I don't have to pass any emission test. Considering gen 2 kit but have one question, does it hurt the vehicle in any way to run it with the bypass kit installed? I was planning to keep this truck for a long time before this
The Gen2 bypass kit will not affect your vehicle negatively in any way. On your vehicle the SAIS will only operate on a cold soak start (Off for 7hrs or more). Not running the system on that start is no different than starting it cold throughout the day. Our bypass kits have been installed on vehicles for almost 10 years now with no issues.
The kit came with the little block-off plates, when/why do I have to install those? This video makes it sound that I just have to 'plug and play' the unit and that's it.
The module and plate installations are covered separately because they both vary according to engine and year. The block off plates are an integral part of the overall bypass solution and may not be 100% required for every instance. However, they are always recommended to be installed with the module and are the only thing that can prevent the valves from leaking in the future if they are not currently. If you do not currently have valve stuck open codes you can install the module first and see where that gets you but it always best to install them so you don't have to worry about the valves later on. If you don't install them just make sure to put them in your glovebox with the instructions because if you get a valve stuck open code later you will need to install them at that point and clear the codes(s) again.
Will any of your kits still work on a Tundra that has had the ECU reflashed by the dealership?
The GenII kit is compatible with all current model years and reflashes. There is currently a certain reflash for certain 12-13 Tundra and Sequoia 5.7L vehicles that makes them incompatable with our GenI V5xH kits but we recommend the GenII for anything 08 and newer anyway because they are a much better solution in almost every aspect.
Wish y'all had a 4.7L gen 2 bypass install video.. looking to buy it soon for my 2007 4.7 tundra.
*Update*
I bought and installed the kit for my 4.7 and the instructions included were great. Very detailed step by step with included pictures. Thanks a lot 👍 everything went smooth.
I just installed the Bypass Module yesterday, probably took longer than it should but I was moving pretty slow. If you follow the video or even the directions included you should be able to do yourself. I sent an email with some questions only to get an actual response from Paul! Yep he gives a shi. about his product and your success with it.
I just installed the gen 2 kit on a 2008 4.7 tundra i just picked up. Great instructions and worked like a charm! Only thing is I installed the block off plates at the air valve. Is that okay and can I take the air valves out all together
@hinds90 In order to remove the Air Switching Valves located on either sider of the engine you will need a full delete kit. That is the Gen 2 Bypass Kit and 2 Pressure Sensor Addons. However, if you only have the Bypass Kit then they will need to remain on the vehicle. This is because there is a pressure sensor inside the Air Switching Valve the ECM is still reading. If you have any questions please do not hesitate to give us a call.
@@Hewitt-tech yep. So I'd just need the pressure switches. I'd like to get rid of them all together. Makes it easier to get to the coils and plugs.
@@BullseyeMetalWerks Correct. You can get two of our pressure sensors add-ons to accomplish that, one to replace each of the air switching valves. If your air valves/sensors are still good, you can also cut the sensors off the air switching valves and get rid of the rest of the valve. They have to be the factory type of valve with the metal body and the black plastic top where the plug is to do this. If you cut all the way through the square black plastic body section as close to the metal valve body what remains is the sensor/connector. When doing so you will cut through the plastic and will cut two wires but those are only for the solenoid coil portion which are not connected or used with the Gen2 kit anyways.
I just bought a 2012 TRD Rock warrior and I've been getting a P0101 with nothing else when I give it some beans. The last owner obviously faced the same problem because it has a new MAF and new PCV on it. No obvious vaccum leaks. When I bought it, it had a rough country CAI on it which I'm not particularly fond of and I've been thinking about finding a stock box to see if that helps. Any thoughts?
The intake is most likely your problem but if its not a factory Toyota, Hitachi or Denso MAF from an authorized dealer you could try swapping that out first. Lots of CAI cause this sort of problem on the Tundras.
@@Hewitt-tech Thanks for the reply. This was my thought as well. The MAF is a Hitachi and appears to be brand new so I bought a stock intake from ebay for $150. Hopefully that takes care of it.
Your SAIS kits have a great reputation so I saved your website as a bookmark just in case I ever need it 😆
The damn plastic nipple securing my hose to my secondary air keeps breaking, not sure how. Will this unit bypass the use of the secondary so if it was to break there’d be no codes?
If you are referring to the plastic vacuum nipples on the air switching valves and as long it is not pressure sensors codes, then yes. Give us a call to discuss more specifically if need be.
I have a 2012 tundra with the 4.6, does one kit fix both sides? Or would I need two kits?
One Gen2 kit covers the vehicle, both banks.
I have a 2012 sequoia ( 4x4 if that makes a difference ).. but I swear this 5.7 is configured differently, I’ve located the switching valves BUT where the connection leaves the valve it is then shielded in plastic with a bunch of other wires and I can NOT find where the other end of these connections go.. I’ve looked all over the place.. ( really hate to take off the manifold ).
All the 5.7l are the same. Give us a call toll free for support. 844-307-7671
I just ordered one for my 2008 sequoia. I really hope this fixes my CEL.
Can I remove the pumps after this is done? Are there any issues doing that?
About to order one of these for my 07
Will this turn my check engine light off?
What are the block off plates for?
The Gen2 kits can take care of most of the SAIS codes that you may have but there are some exceptions. Once everything is installed you will need to clear the codes by resetting the ECM with either an OBDII tool or by disconnecting the neg. battery terminal for at least 2 min. to turn off the CEL.
The block off plates are to permanently close the air switching valves and are used to prevent valve stuck open codes.
Please check out the blogs and other information on our website: hewitt-tech.com
Give us a call Toll Free and we would be glad to help make sure you get what you need and can answer all your questions or shoot us an email. 1-844-307-7671 support@hewitt-tech.com
14:00 the wife and I just installed it tonight Codes are gone. Helpful tip to disconnect the passenger side connecter use a screwdriver go between the main wiring harness, and the motor push down on the clip comes right off 5 seconds unbelievable couldn’t believe it. I wish I would’ve done that to the driver side as that took like 20 minutes.
2007 Toyota tundra, 5.7 L.
478,000km
@jaywiseman3778 Thanks for passing along your experience and these connectors can be a bit of a bear to get to. Glad to hear your codes are clear and the truck is back to normal. If you have the time we would greatly appreciate if you could also share on our Google review page. Please let us know if there is anything else we can assist with in the future. g.page/r/CYkk2OeC9CgvEB0/review
Do you cover a 2007 Sequoia 4.7L with P0418/P2445 codes? I also have P0340/P0345 camshaft position sensor codes but I feel its related to this "pump stuck off" issue.
We do have Bypass Kit compatible with your '07 Sequoia 4.7L to address the SAIS fault codes of P0418/P2445. Unfortunately, our products will not address the camshaft position sensor codes. Give us a call and happy to walk you through the Gen 1 & Gen 2 Bypass Kit options. (844) 307-7671
Im just install the gen II kit with plates and now i have the bank 2 catalytic converted engine light, ...there's something missing in installation or have nothing to do with it?
I think I have a Gen 1 unit. Where can I find the video instructions for this one?
We have some in our channel but they are due to be redone. There are also several customer installation videos that are pretty decent if you search, just make sure you are watching one for your Hewitt Tech V36 or V54 kit.
If I want to install this kit and use it for offroad,would it be able to pass smog inspection{Houston}if I wanted to go back to street?
First you must know Hewitt Technology’s SAIS Bypass Kits and products are sold for off-road, competition or other emissions exempt vehicles only. It is illegal to remove, dismantle or otherwise cause to be inoperative any pollution control device required by federal, state, or local emissions law. If you have any additional questions please do not hesitate to contact us (844) 307-7671 or support@hewitt-tech.com
I have a 2009 LX570 code p1614, so this is the device I'm looking for?
As long as the P1614 - Air injection control driver malfunction bank 2 code is not caused by damaged wiring or ECM then yes the GenII kits can take care of P1613/14 also.
Hi, I have a 2010 tundra 5.7 with a valve issue, do you have something for this??? thanks
Yes, this video is the Gen2 kit for your truck. Links in thr description.
how long does this generally take on a tundra 5.7L? I do auto work on the side and have someone asking for this install. Trying to figure out how many labor hours to charge for. Thanks!
We usually say 1-2 hrs is about average. Just pay close attn to the block off plates installation. If it is a rusty truck those may cause extra time.
@@Hewitt-tech yea I live way up above the rust belt and this trucks got damn near 200k miles on it. Thanks so much for the reply, and the videos! Going to try a magnetic induction heat gun on it if I can't just get a nut cracker in there depending how bad they look.
Where to buy this bypass
Everything went smoothly except unplugging the OEM connectors. Still having trouble getting it undone.
If you can't get your hand back there or enough leverage to squeeze the lock tab and pull... try pushing the tab with a flat screwdriver and another to catch the connector and push it off.
Do the 2014-up tundra need this upgrade what are the benefits of doing this mod
Hey Kirk. It's not an upgrade to anything. The kits are used to prevent or fix codes from the secondary air injection system failing. The Gen2 would be the one you would need to use on a 2014 or newer. No gains other than clearing codes and getting out of limp mode for a lot less cost of replacing the system.
I put the rutech bypass in. no problems. turned off the light by diconecting the battery and it went out but it came back on after driving about 50miles.. I did it again and it stayed about 48 hrs. then came back on and went into limp mode.
We can't help you with a competitor's product but guessing you have an 08+ vehicle and are getting a P106B Temperature Correlation code? Please give us a call Toll Free or email us and we would be glad to help with a properly engineered and supported product specifically for your vehicle and codes.
Toll Free 844-397-7671 support@hewitt-tech.com hewitt-tech.com
Hey, I bought and installed the product on my 2010 tundra v8 4.6 and it worked great for a year or so. But now the lights are blinking again, and it is stuck in limp mode. It pulled the code P2442 stuck air injection pump. It also pulled a code for the 8 cylinder so I replaced the coil.
Please give us a call Toll Free 1-844-307-7671 or email us directly at Support@hewitt-tech.com
The P2442 is a Bank2 Air Switching Valve Stuck Open Code. If you did not install the block off plates you will need to get them installed and clear the codes again. If can verify that you do have the plates installed, this usually indicates the pressure sensor in that valve has failed. They can be damaged by continuing to drive the vehicle with the valve stuck open codes for a while before installing the kit. It doesn't happen often but the damage can also show up much later. There is also the possibility the sensor just failed but we usually only see that with aftermarket parts and not the factory Toyota sensors. We have kit add-ons for the sensors depending on which kit you are using to take care of this without having to replace the air switching valve. Give us a call and we can hep troubleshoot and get you what you need.
I didn't get the harnesses that go to the back of the pumps. I put the one harness on and the exhaust block off plates, now I have an exhaust leak on the drivers side. Im so confused now
Please contact us directly for help. Support@hewitt-tech.com Toll Free 844-307-7671
Same thing happened to mine today once i got through with the instal. What did you do to stop the exhaust fumes from leaking out through the “Block Off plates”?
I installed mine on 5.7 2010 tundra about a year ago and it worked great up until this week. ???
Hey Steven, sorry to hear if you are having problems with the secondary air injection again. Please email us or give us a call directly with your order number and the current active trouble codes and we would be glad to help. Could be something completely unrelated or something really simple like needing to install your block off plates. support@hewitt-tech.com 1-844-307-7671 so we can start a ticket if we need to.
Will my 2013 Tundra 4.6 pass inspection and SMOG with this installed? I'm in California.
They are sold for offeoad or other emissions exempt use only. Please see the video description and other comments for more information about this or visit our hewitt-tech.com site.
@@Hewitt-tech I read the FAQ section. Thank you! Ordering tonight.
I know this is older video what are the benefits for doing this mod is what I'm wondering and does if creat any kind of back pressure from blocking the exhaust ports off
@michaelnorman6905 Our Bypass Kit can be installed as a preventative or reactive measure to SAIS failures and trouble codes (CEL).. The main reason for our kits is to prevent limp mode that is associated with many of the trouble codes caused by a failing/failed secondary air injection system. The block off plates are effectively there to permanently close the air switching valves. This prevents exhaust gases from leaking backwards through leaking/damaged/failed air switching valve and cause the valve stuck open codes which are the most common SAIS code that cause limp mode. The block off plates do not affect the normal flow of exhaust, they only block off the secondary air exhaust ports in the head. I have included a few links that to blog post that further explain if you are interested.
hewitt-tech.com/blog/what-is-the-secondary-air-injection-system/
hewitt-tech.com/blog/secondary-air-bypass-kit-comparison/
Our bypass kits and products are for off-road use only and are not legal to be used on highway and non-emissions exempt vehicles.
Thanks
I purchased the Gen 1 (V54H) for 5.7L 2008 Tundra. is there a video for the Gen 1. Thanks.
I have one filmed but unfortunately the last couple of years have been focused on supply chain and engineering to get around part shortages. I hope to get back to fleshing out this sort of thing soon.
@@Hewitt-tech Thanks appreciate it.
does this help if I was given a P2442 code (valve stuck open bank 2)?
Yes, the kit can take care of that code as long as it is not the result of a damaged pressure sensor or ECM. Typically, if this is something that just started you don't have to worry about that and the kit will take care of it.
If you have been driving it that way for a while there it would be best if you gave us a call so we can discuss the possibility of also needing we call a Pressure Sensor replacement. This is a kit addon we use so you don't have to pull the intake manifold and replace the air switching valves just to fix a sensor. Regardless of our kits, those sensors, the wiring and ECM have to be good.
How long can this kits last before it fails to buy another one, or is it a life time kits that won't fail forever
Our kits are engineered and designed with the best available automotive grade devices and components with the expectation they will last the life of the vehicle. They are however still electronics which is why we cover all of our kits with a non-transferable limited lifetime warranty. If there is a problem this is where our full technical support takes over. If after troubleshooting we determine the unit has failed under normal operating conditions and use, we will replace it for as long as you own the vehicle.
Question, would this fix both banks with one unit or are two separate units needed?? Please help out I’ve got codes p2443 and p2441, indicating both banks are stuck closed.
The one unit covers both banks. You will notice in the video and instructions, the Gen2 unit replace both air injection control drivers with our single unit.
Thank you
(2011 Tundra 5.7L w/207K miles) What codes will cause the Tundra to go to limp mode? Current codes are P106B, P2431 and P2433 codes. My tundra still drives like normal. I can cruise at 80 mph fine no power cut. Can I drive it with the codes on forever or will it need to be fixed? I don't live in a state that has emission testing. Can I just get Gen 1 kit or will I need to get GEN 2 kit? Will GEN 2: PRESSURE SENSOR REPLACEMENT SINGLE be needed as well since I have P106B code?
The codes you have are directly related to the pressure sensor circuit in your Bank 1 SAIS Air Switching valve. The P2433 - Bank 1 Pressure Sensor Ckt High is an electrical fault code that will typically cause limp mode that you will not be able to clear until it is repaired. Normally when we see this code it is the result of wiring damage or caused by driving the vehicle for to long with an active valve stuck open code. With the circuit codes, especially if it showed up suddenly with no other issues, we first recommend inspecting the wiring and making repairs as needed. In the colder months it is not uncommon for rodents to chew on the wiring.
The P106B code is a pressure sensor correlation code and the P2431 is a sensor performance/range code. The ECM compares the two pressure sensors in the air switching valves and the EVAP pressure sensor, if one is more than 5-6 kPa different than the other two it will throw the P106B code to say there is some sort of problem. This code by itself does not typically cause limp mode. In a case like this with your codes it is easy to say that the bank 1 pressure sensor is the problem.
The firs thing to do is check the wiring and then our normal recommendation for this would be the Gen2 kit and at least 1 PSR for the Bank 1 sensor.
You could use the Gen1 kit and would still need a PSR but for anything 2008 and newer we will always recommend the Gen2 vs the Gen1 V54H kit just because it covers so many other issues and is by far the best solution to ensure you shouldn't have any issues with the system again.
Please give us a call Toll free and we would be glad to walk you through your problem and our solutions with you.
@@Hewitt-tech Thanks for the fast response I will contact you guys.
I have a p2447 code on a 2007 Toyota Tundra. Do I just need the gen 2 bypass?
Typically that should be all you need. Especially of it just started happening or you can still clear it and drive fine for at least the rest of the day. If not, give us a call on Monday and we can have a conversation about the best options for you. Toll Free 1-844-307-7671
This kit will make the P2443, P2438 and P2436 codes go away? Got a 08 tundra 4.0 v6
We can help with all of those codes but some of those are pressure sensor circuit codes that will need some special attn. Please give us a call toll free 1-844-307-7601 or shoot us an email support@hewitt-tech.com before placing an order.
Some of those codes can be the result of wire damage, sensor damage, bad aftermarket parts or even a damaged ECM.. We can still help take care of all those codes but sometimes it is not as straight forward as just needing the bypass kit.
How did you fit your hand behind the passenger side??? Its super tight back there and the harness is literally right over it. I was able to force my hand back there but then my hand was stuck and i hand no leverage to pull the connector off.
You can unbolt the main engine harness support and a couple other things in the area to VERY gently get more room from the main engine harness. To unclip the connector try laying a small a flat head screwdriver on the tab so you can easily depress it with your thumb, or use your other hand to carefully push down from above with a long screwdriver so you can use your full grip strength to pull the connector off.
@@Hewitt-tech was finally able to get it off. Used a 12in needle nose plier. I was able to fit the plier in from the side and to get it off. Thanks.
@@Hewitt-tech i havent installed the block off plates. Its like 10° here in MN today so im planning to install them tomorrow instead of today. I did clear the codes and took the truck for a cruise around the block. The lights came back on and its back in limp mode. Im guessing once i install the block off plates, and re-clear the codes, it should solve it? I was getting code p2440 valve stuck open.
@@franklock123 installing the plates would certainly be the next step. They are recommended regardless of the code but are required if the valves are physically stuck open or leaking exhaust. After that and clearing the code(s) again if you get a CEL again read the codes and give us a call or send us an email.
@@Hewitt-tech ok so i just got done installed the plates. I cleared the codes. The code p2440 didnt come on anymore and im not in limp mode anymore. However, a code p0983 came on after 1min of driving. The truck wouldnt go into 5th or 6th gear. I stopped the truck after a few minutes. Re cleared the codes again. And drove it for about 15minutes on and off highway. The codes didnt come back and the truck seems to be fine. Ive never had the code p0983 before or had any transmittion issues. Wondering if its normal for this code or other codes to pop up after install the by pass kit.
So for the 4.6 do the air switching valve stay on the car ? And if so where am I using the blocking plates ?
The air switching valves will typically always just stay on the vehicle. On the 4.6L the plate installation is even easier since the air switching valves are located on top of each valve cover. For these we just have you install the block off plates at the air valves themselves. Check out our installation instructions on the "Instructions" page of our website:
hewitt-tech.com/instructions/
The plate instructions are by engine displacement about half way down the page.
@@Hewitt-tech I really appreciate your reply. I figured it out yesterday though thank you so much. Instructions were AMAZING
Great video. Please I'm trying to do this on my 2008 tundra 4.7 liter. Do you have any video/ link on that? Thanks
Not at this time. I have one for a 4.6l that is pretty much the exact same but have not finished editing it yet.
@@Hewitt-tech ,ok will be waiting. Thank you.
@@Hewitt-tech Do you have the 4.6l finish I just bought the Gen II and ready to install
@@Scottyp857 Unfortunately not yet. It is next on the list but upgrading our website took priority recently.
@@Hewitt-tech I just bought a kit for my 08 tundra 4.7 have you finished the video yet and does that need the block of plates installed
2007 Tundra 5.7, If the pressure sensor of bad or coding is there just one. Meaning does the add on kit just need and come with one replacement plug and play air pressure sensor replacement unit?
On your 2007 5.7L, there are two pressure sensors, one in each air switching valve. Regardless of our kits, your vehicle needs both of those to function correctly. Because of the way the Gen2 kits function, you need one pressure sensor add-on for each damaged sensor. Each of the sensors add-ons for the Gen 2 kit are one sensor. With the Gen1 kits we can get away with using a jumper harness to use one of the good sensors for both banks or a single add-on sensor for both.
Then, will the Gen 1 kit work for my above vehicle? And if so overall cost me less to bypass the sais?