Jo Daddy, this was an excellent video! Thank you very much for your very clear tutorial and outlining each step. I'm heading to the parts store now to get my sensor and a wiring harness (which I didn't realize I needed). In 30 miles my highlander will hit 200,000 miles so perhaps this is a common issue around this drive time usage. Again, many thanks!
Jo Daddy Thanks for the Video, it helped a lot! - I just replaced two knock sensors on an 04 Sienna. Same basic procedures as you outlined. Likewise the tough part of the job was getting the plenum off - on the Sienna there were several bolts to deal with. Using basic tools it took a combination of removing the accessible upper bolts and the lower bolts on the engine block. It took me all day! Next time I am paying a mechanic - they cite about 3.5 hours of labor to replace two knock sensors. IMO its worth it! I learned a lot and felt like I gained more respect for mechanics that deal with these challenges daily. Thanks for taking the time to share your experience with us DIYers.
Thanks for the video I got the sensors out and waiting for new ones to arrive. I just wanted to add that I cut a 9/16 socket in half and was able to remove the bolt by the firewall.
You are right. Reusing an old gasket like that is a very bad idea. You are asking for trouble. Those gaskets are meant to be compressed just once. You can end up with another trouble code for an air leak and an air leak somewhere in the induction system can be very difficult to find. He also should have put paper towel into the intake ports to prevent anything from falling down inside there.
Just did my 04 tundra that rats chewed through knock sensor harness. A tip for all: Honda makes a rodent tape that is made with chili peppers, $50 a roll shipped but worth the piece of mind, wrap that harness while in there!
Is there anything I can try life an additive or something that could clean this sensor?? Sorry to sound lazy I just am desperate and can't do this myself.
So real quick- P0330 code is present on my girls 03 highlander. Ive been reading some of these comments and others and seen where people are saying if the knock sensor will keep it from shifting into 4th gear. Driving the other day I noticed the car wasnt shifting into 4th gear. She told me that she "Hadnt noticed it and replied "Is that not normal". Yeah haha. Fluid looks good and all so when i hooked up the scanner i had a P0330 code. Has this fixed others issues of not shifting into 4th gear (OD)
I had same problem on my 01 highlander, goes into limp mode and doesn't shift to 4th, I changed knock sensor wire harness, still showing knock sensor codes tho, half of my engine is running lean to which I think is causing knock sensor to show, any suggestions?
Hi, I'm replacing the knock sensors on my 2006 Toyota Sienna, and your video has been helpful. What I'm curious about is how you got to the brace that is connected to the rear of the plenum? I see that you disconnected the brace from the engine block, but is that accessible from underneath the vehicle? I'm so close to getting this done, but like you said, there's no way to get to the bolt thanks to the firewall and the sides of the bracket!
Thanks! That was easy enough however, there is another 10mm nut holding a hose bracket on the support bar for the plenum. Do they expect you to lift the entire engine out in order to release the plenum on the 2006 Sienna or am I just missing something. This is the most ridiculously engineered vehicle I've ever owned...
@@rgt8309 Just to be clear. What you actually purchased were Chinese knock-off parts and not Toyota original. Hopefully they worked out for you and have lasted. I'm not suggesting they are inferior ... just not original.
@@PresidentGas1 No. the description said they were original Toyota parts and the label verified it. Plus, when I took out the bad ones, they matched perfectly.
Very helpful, thanks! A question for ya -- what kind of socket (brand and style) did you use to remove the knock sensors? My Husky standard socket is too shallow to fit and my Husky deep fits nicely over the sensor, but then there is not enough room to attach wrench to it. Since the depths across brands vary, the hunt is on...
Jo Daddy's Garage Thanks! Ended up getting a big (1 1/16) combo wrench. Had just enough angle to grab just enough of the sensor. Changed both sensors and the wire harness...and after about 20 miles so far so good! One tip to other novices like myself, I think you better drain the coolant before opening the intake manifold. I didn't and coolant leaked everywhere. I imagine that's common sense in the auto mechanic's world, but figured I throw that out there. One other question Jo Daddy -- How in world did you get the passenger side bolt off the back of the plenum against the firewall? More precisely, how did you get it back on??? Unbelievably inaccessible and was by far the hardest part of this job :)
Djpoints Glad you figured it out. Definitely want to drain the coolant. That bolt was rough. I thought I went into some detail on that. I thought I unbolted the bracket from the engine, and pulled the bracket with the plenum.
When you said “try to get to it without taking the plenum off” I was like HA. HA HA funny. I did the valve cover gaskets on my 01, now it’s not going into O/D so looks like I’ll be pulling the plenum back off and now the manifold? 😥 Still one of my favorite vehicles
Hey Jo Daddy, great job on this video! I have a V6 98 Camry with basically the same set up and am looking at replacing mine as well. What I'd like to know is, if you removed the bypass hose, did you replace the coolant as well? And can you remove the knock sensors without having to remove the bypass hose?
Nice way to handle Air intake support bracket bolt. I read forums with lot of folks struggling with taking off air intake. BTW, how did you take off old knock sensor harness? It's stuck with lock on support. I'm stuck with this step.
Hana my dumbass didn't drain the coolant before starting. Thankfully it only entered 2 intake ports and the valves were closed. Took a windex nozzle and drained them out. Rookie mistake tho to be sure
Ok I just went through the whole process. Installed new sensors put everything together just like in came and now my starter is making a loud jerking and not cranking the truck. Any help would be nice it's got me baffled since I didn't have to touch the starter.
I have an '07 Toyota Highlander and I just had a check engine light and a VSC light and I went to get the code checked and it said it was a bad knock sensor I only have 149,000 miles on it. I'm terrified this is my 2nd car I've had bad luck on.
I just loaded up $300 worth of Toyota parts on amazon!!!! 2002 sienna 205K 2 knock sensors 1 harness 1 coolant hose under there Fel pro gasket set (3) in set True 1 harness for both sensors?
Screw Toyota and I thought they were good. I just did the timing belt and now this pops up. if I ever get a Toyota again it will be the 4 cylinder with a timing chain in the years without the head gasket problems, lol. Why they ever put a wiring harness in such hot space that couldn't take the heat in the six and why they ever put a starter under the intake on the v8 is just poor engineering.
I just replaced the knock sensor on my 2002 today. had exactly the same rat nest, WTF . I couldn't believe it. "Definitely the cause for SHIFT PROBLEMS/OVERDRIVE FAILURE" as mentioned from Brian's comment
That is not a failure. The engine computer locks out the overdrive when the knock sensors fail. This is to protect the engine from undetected engine knock until the sensors are fixed. Once the code is cleared the overdrive works again.
Jo Daddy, this was an excellent video! Thank you very much for your very clear tutorial and outlining each step. I'm heading to the parts store now to get my sensor and a wiring harness (which I didn't realize I needed). In 30 miles my highlander will hit 200,000 miles so perhaps this is a common issue around this drive time usage. Again, many thanks!
Jo Daddy Thanks for the Video, it helped a lot! - I just replaced two knock sensors on an 04 Sienna. Same basic procedures as you outlined. Likewise the tough part of the job was getting the plenum off - on the Sienna there were several bolts to deal with. Using basic tools it took a combination of removing the accessible upper bolts and the lower bolts on the engine block. It took me all day! Next time I am paying a mechanic - they cite about 3.5 hours of labor to replace two knock sensors. IMO its worth it! I learned a lot and felt like I gained more respect for mechanics that deal with these challenges daily.
Thanks for taking the time to share your experience with us DIYers.
+David Blaine Glad it helped, and you should feel good about doing it yourself. Thanks for the comment.
I'm in the process of replacing on a 2006 Sienna. Thanks for adding your experiences. The one thing I am realizing is that I need smaller hands!
Very thorough video, but you missed filming the most important part...the sensors!
Thanks for the video I got the sensors out and waiting for new ones to arrive. I just wanted to add that I cut a 9/16 socket in half and was able to remove the bolt by the firewall.
If u do this job remember to replace intake manifold gasket... to ensure no problems ... never re use gaskets. ..
Sure
Hi
You are right. Reusing an old gasket like that is a very bad idea. You are asking for trouble. Those gaskets are meant to be compressed just once. You can end up with another trouble code for an air leak and an air leak somewhere in the induction system can be very difficult to find. He also should have put paper towel into the intake ports to prevent anything from falling down inside there.
Patand Mikes, it helped with the shifting problem, and corrected the poor gas mileage as well. Can't guarantee it for you.....
Jo Daddy's Garage Do you have to drain the coolant before you begin?
Yes. Drain the coolant.
Just did my 04 tundra that rats chewed through knock sensor harness.
A tip for all:
Honda makes a rodent tape that is made with chili peppers, $50 a roll shipped but worth the piece of mind, wrap that harness while in there!
Not an easy job, but you got it done.
Yeah, I wasn't totally sure when I started. I was hoping I wouldn't have to go so deep.
@@JoDaddysGarage how much does this cost just labor I have the sensors
I don't have a good answer for you. I did this for a friend.
wow that much disassemble for the knock sensor
Is there anything I can try life an additive or something that could clean this sensor?? Sorry to sound lazy I just am desperate and can't do this myself.
So real quick- P0330 code is present on my girls 03 highlander. Ive been reading some of these comments and others and seen where people are saying if the knock sensor will keep it from shifting into 4th gear. Driving the other day I noticed the car wasnt shifting into 4th gear. She told me that she "Hadnt noticed it and replied "Is that not normal". Yeah haha. Fluid looks good and all so when i hooked up the scanner i had a P0330 code. Has this fixed others issues of not shifting into 4th gear (OD)
Dustin Nealy It solved the shift issue, and it increased gas mileage from what the owner told me.
Dustin Nealy dam this is the exact same thing that is going on with mine. a mechanic wants me to replace the whole transmission.
I had same problem on my 01 highlander, goes into limp mode and doesn't shift to 4th, I changed knock sensor wire harness, still showing knock sensor codes tho, half of my engine is running lean to which I think is causing knock sensor to show, any suggestions?
Hi, I'm replacing the knock sensors on my 2006 Toyota Sienna, and your video has been helpful. What I'm curious about is how you got to the brace that is connected to the rear of the plenum? I see that you disconnected the brace from the engine block, but is that accessible from underneath the vehicle? I'm so close to getting this done, but like you said, there's no way to get to the bolt thanks to the firewall and the sides of the bracket!
If I remember correctly, I got it from underneath the vehicle.
very similar to a honda accord,have to go from the bottom....
Thanks! That was easy enough however, there is another 10mm nut holding a hose bracket on the support bar for the plenum. Do they expect you to lift the entire engine out in order to release the plenum on the 2006 Sienna or am I just missing something. This is the most ridiculously engineered vehicle I've ever owned...
Thanks!!
I've seen worse.... Not sure what to tell you on the other bolt.
Thanks for the video. Can you share what sensors you bought. The Toyota ones are super expensive...
I don't really remember, but it's likely I got them from Advance Auto.
I'm getting mine (Knocks Sensor 1) from auto zone for about $155!
Not really. I just bought a brand new set of Denso knock sensors and the original Toyota wiring harness for $43 off Ebay.
@@rgt8309 Just to be clear. What you actually purchased were Chinese knock-off parts and not Toyota original. Hopefully they worked out for you and have lasted. I'm not suggesting they are inferior ... just not original.
@@PresidentGas1 No. the description said they were original Toyota parts and the label verified it. Plus, when I took out the bad ones, they matched perfectly.
Very helpful, thanks! A question for ya -- what kind of socket (brand and style) did you use to remove the knock sensors? My Husky standard socket is too shallow to fit and my Husky deep fits nicely over the sensor, but then there is not enough room to attach wrench to it. Since the depths across brands vary, the hunt is on...
Djpoints Well, honestly, I think I used a crescent wrench...
Jo Daddy's Garage Thanks! Ended up getting a big (1 1/16) combo wrench. Had just enough angle to grab just enough of the sensor. Changed both sensors and the wire harness...and after about 20 miles so far so good! One tip to other novices like myself, I think you better drain the coolant before opening the intake manifold. I didn't and coolant leaked everywhere. I imagine that's common sense in the auto mechanic's world, but figured I throw that out there. One other question Jo Daddy -- How in world did you get the passenger side bolt off the back of the plenum against the firewall? More precisely, how did you get it back on??? Unbelievably inaccessible and was by far the hardest part of this job :)
Djpoints Glad you figured it out. Definitely want to drain the coolant. That bolt was rough. I thought I went into some detail on that. I thought I unbolted the bracket from the engine, and pulled the bracket with the plenum.
defintely the cause for SHIFT PROBLEMS/OVERDRIVE FAILURE
When you said “try to get to it without taking the plenum off” I was like HA. HA HA funny. I did the valve cover gaskets on my 01, now it’s not going into O/D so looks like I’ll be pulling the plenum back off and now the manifold? 😥 Still one of my favorite vehicles
Hey Jo Daddy, great job on this video! I have a V6 98 Camry with basically the same set up and am looking at replacing mine as well. What I'd like to know is, if you removed the bypass hose, did you replace the coolant as well? And can you remove the knock sensors without having to remove the bypass hose?
Also, how long did this take you to do?
Pretty sure the hose needs to be out of the way.
I did it in about 4-6 hours I believe.
Nice way to handle Air intake support bracket bolt. I read forums with lot of folks struggling with taking off air intake.
BTW, how did you take off old knock sensor harness? It's stuck with lock on support. I'm stuck with this step.
Thanks. I just look at things differently. I don't remember what I did for that clip.
what knock sensors did you use and how are they holding up?
Tghis video is so old. I probably got them from Advance Auto. Vehicle ran for years afterwards. They finally sold it.
So, how much antifreeze was accidentally flooded in to the intake ports that left wide open which you cut out of the video...?
Didn't have any. I drained the antifreeze before I started removal.
Hana my dumbass didn't drain the coolant before starting. Thankfully it only entered 2 intake ports and the valves were closed. Took a windex nozzle and drained them out. Rookie mistake tho to be sure
Ok I just went through the whole process. Installed new sensors put everything together just like in came and now my starter is making a loud jerking and not cranking the truck. Any help would be nice it's got me baffled since I didn't have to touch the starter.
Hmm. That is odd. Loud jerking, like won't turn at all?
Nope the starter does a hard jerk moving the engine but not turning it over. Before everything was fine.
@@claywint5977 That's really odd. There's no interaction of parts...
damn, looks hard job I'm thinking to do mine myself but heck no Its looks hard. but thank for video
I have an '07 Toyota Highlander and I just had a check engine light and a VSC light and I went to get the code checked and it said it was a bad knock sensor I only have 149,000 miles on it. I'm terrified this is my 2nd car I've had bad luck on.
Sorry to hear that.
My Highlander 2033 code P0332 P0442 P0446 these issues will i need to fix asap, kindly to see your advice thanks !
Hello sir I can't ask you some Questions??
do you have to Toyota part numbers for these 2 knock sensors?
Sorry, I do not.
I just loaded up $300 worth of Toyota parts on amazon!!!! 2002 sienna 205K
2 knock sensors
1 harness
1 coolant hose under there
Fel pro gasket set (3) in set
True 1 harness for both sensors?
I believe one harness is correct.
Thank you for your video and help
My Toyota hero! Admiring. I need a drawing diagram and I can do this. ;p
So did whatever was living in there chew through the knock sensor wire? I'm guessing that's a shielded wire? great tutorial. looks fun.
The critter did not chew it up. The wire is in a plastic sleeve. Thanks.
It was a little more complicated than I had hoped.
It took about 4.5 hours to take apart, and about 2.5 to put back together.
Very cool. I have an original 1931 Model A Tudor that I restored. It was my grandfather's car. I may do a video of that car soon.
How did you clear the code?
I have a scanner I bought at the parts store that can clear codes.
Thanks for the answer!
you can also unhook your battery for about 5 mins and it will clear it as well
can you post the image .jpg...im guessing..from ALLDATA? right click and save image
Sorry, I don't think I have access from home.
No problem
I have a 99 Toyota solora v6 I can't find the knock sensor any idea where it's located on that vehicle?
Sorry. I do not.
Screw Toyota and I thought they were good. I just did the timing belt and now this pops up. if I ever get a Toyota again it will be the 4 cylinder with a timing chain in the years without the head gasket problems, lol. Why they ever put a wiring harness in such hot space that couldn't take the heat in the six and why they ever put a starter under the intake on the v8 is just poor engineering.
Im.pretty sure i fucked up my
Car doing this
What happened?
@@JoDaddysGarage not sure I put everything back together but now the coolant on the radiator is overheating.
@@marco209lodi5 Air in the system. Need to burp it. May have to jack it up on one side, and make the radiator cap the highest point. Add antifreeze.
Eff Toyota flr putting a sensor in between manifolds and with a coolant hose running over its connecting wire.
I just replaced the knock sensor on my 2002 today. had exactly the same rat nest, WTF . I couldn't believe it. "Definitely the cause for SHIFT PROBLEMS/OVERDRIVE FAILURE" as mentioned from Brian's comment
defintely the cause for SHIFT PROBLEMS/OVERDRIVE FAILURE
That is not a failure. The engine computer locks out the overdrive when the knock sensors fail. This is to protect the engine from undetected engine knock until the sensors are fixed. Once the code is cleared the overdrive works again.
What torque did you use on the knock sensors?
I just made them tight. Didn’t check torque.