Swearing or no swearing ,you still one of the best reviewers on youtube.Nicely explained so most of us can understand.Keep up the work,most of us are extremely grateful and appreciate it.
If anyone is having trouble pumping gas in this model car, you definitely want to check the filter tube vent. This is located driver's side rear wheel well. You will have to remove the wheel to get access to the plastic shroud in the wheel well. The filter tube vent is located behind there. You'd be surprised how much road debris actually gets trapped up in there despite it being covered. When I cleaned mine, I removed a dustpan sized pile of dirt and sand. In my case, cleaning that filler vent did the trick allowing me to pump gas, and not have to do the "flip the gas nozzle upsidedown" trick in order to pump gas. 3 years since and still pumping gas fine. Just a quick tip no one really talks about. 😉
@@codyshuey258 Search RUclips with the year make and model of your car, and evap canister vent valve/solenoid. On a 2001-2006 Hyundai Elantra that valve/solenoid is located in the charcoal canister housing located left rear...under the bumper and behind the left rear wheel. Open the housing, disconnect the hoses, and check for charcoal or any other blockages in the valve and in the hoses connected to it. Might possibly be your valve is stuck closed and unable to open and close as needed. If that's the case, a replacement would be needed and is fairly simple and inexpensive. Sorry, if that's not the info you're seeking. Good starting point at least. Good luck.
Very helpful video. I am a tool & die maker in the automotive sector. When I asked this error code to be explained, I was told things that made no sense. The more clarification I asked, the more I realized I was being sent down a rabbit hole of being ripped off at a Ford dealership. Can't stand these repair sales folk who think they can sell a story to anyone and everyone will believe them. Thank you for the enlightenment.
@@reweydewy Verbally, when it comes to large leak, they tell me their guessing which part, as they've replaced them one by one. Now that I want a state waiver from any more evap bills, in writing, it says "Customer is refusing general diagnostics." ?!?
I've watched 15 or 20 videos concerning EVAP System problems (PO447) yours is the only one that helped. Great illustration, great description, and good videotaping. Thank you!
You are seriously the hero of the day. This just saved my butt completely. After checking the wiring and replacing the solenoid With no luck of getting rid of the code, i watched your video. Unhooked everything and dropped the Evap canister blew air into it to see if it was clogged. Seemed fine. Traced the hoses back only to find dirt packed completely in the outside vent. Looked like the vent cover may have been reinstalled upside down by someone so it was able to fill up like a cup. Anyways thank you so much ! Blessings
That happened to my aunt's '05 Sedona. She took it to a mechanic down the road and he said it needed a new cam, lifters and a head job. I put my code reader on it and she told him to hold off and replace the solenoid. he did and it's still running great.Thanks for making this video...!!!
love all your videos!! being a women who is tired of machanics taking advantage of women !! you are on my top 5 machanics i go to when i have a problem. I enjoy all the videos i have watched !! Thank you so much!!
Dammit, when will the Czech's build an OBDC scanner protocol proxy device that continuously sends a reset to the car's computer while at the same time sends a "We're cool here, nothing to see" output to the DMV's connection? Because sending perfectly running and SAFE cars to the crusher due to yearly DMV crucifixion is killing us.
@@johnsaccoccio7373 I'm fairly close to that (perfectly running and safe, sent to the crusher) myself. Dealer and mechanics can't resolve P0455, for the past 2 years. I don't understand the necessity of having the system open for purging. Closed fuel system with one-way inlet of air to avoid vacuum, would seem to do the job.
I know this is old, but thank you. Been looking at this, everyone talks about replacing the various parts, but no one shows a simple schematic of how the system works. Best info I've found in several hours of searching.
Love this guy's videos, great quality and legitimate explanations and breakdowns. I've talked to other "professional" mechanics that can't give a clear breakdown on issues. You have helped me turn into a pretty competent DIY mechanic for myself, family and friends
Just changed Vapor purge solenoid P0456 2006 Grand Cherokee 3.7l....took 1 min and smoothed out my idle. saved me $200, Thanks. Fastest 200 I ever made. Better to be in my hand than than the dealers cash machine.
Well done, very well done. My dad was called Maestro by all his friends when fixing their cars in our garage drinking bear. I can say that your friends and myself can and should call you Maestro. You explain the process very well thanks for the info.
Wow....various garage guys have been throwing vocabulary at me for a week now. I'm not a helpless girl when it comes to cars but the whole thing was getting on my nerves. THIS was an AWESOME explanation. We'll be able to get the car to pass inspection now that we know what to look for and replace/repair. THX!
Tanks also have pressure sensors that the PCM uses to determine how much vaccum pressure the tank needs, in order to know what signals to send to the purge valve and the vent solenoid. The gas caps is also vented to let in fresh air to the tank upon vaccum pull from the PCM. Caps determine open or closed based on vaccum and gas pressures and vary based on tank pressures.
14 year old Suburban with 235k miles. Never had any issue with evap system until recently. Have the evap system small leak 0442 code. Suspecting one of the valves or charcoal or maybe a line leak/connection. Don't have a smoke machine so might just have to be hit or miss . Don't know how that charcoal has been effective at filtering vapors over that timeframe! Not complaining. Great video. Thanks
This video was very helpful. I been having problems with my Jeep Grand Cherokee Laredo 09' I thought it was my spark plugs and cord's and spark wires. So I changed them and the problem got bad. So I drop my gas tank and changed the fuel pump and still was acting bad. So I read up on it and now I probably know it's a bad purge valve. But I'm glad I changed everything myself and I'm learning as I go along in life.
Thank you for this video! I had a P0442 code and was doing all kinds of research trying to diagnose it. Your video helped me understand the evap system better and I was eventually able determine it was the vent valve. Apparently I backed into something and damaged it. Anyways, I replaced the valve (and some other evap components) and yesterday I passed smog :D Again, thanks for this video and the great info you provided!
Thank you, Thank you, Thank you! I’m having these exact symptoms on my 2013 Ford Fusion and I’ve already purchased a replacement vapor canister vent valve but I didn’t fully understand how it worked/how it would give me these symptoms! But thanks to your video and diagram, you have given me all the information I need to fix my issue! Great job sir!!!
I have watched several videos to get my head wrapped around the evap system because I have to know how the step I am doing is affecting the entire system or pause the video after step execute it, and then listen to desired outcome. If they don't match, I still can't diagnose because I am not familiar with the terms. Your explanation of the entire system fixes all that. Thank u sir.
Awesome detailed video! Exactly what I needed....I like the way you draw out diagrams and make them simple enough a simpleton like myself can comprehend...I had code P0449 and followed your instructions...I bench tested it with my power probe and get 12v on hot side and 0v green light negative on control side, however I don't get an audible click whatsoever when I supply 12+ v through my probe..I also used my bi- directional scan tool to help troubleshoot and test, still no click! I'm gonna buy a new vent solenoid.... thank you.
That voltage on the Ground side is called Bias Voltage. It is a common technique in circuit design to detect if there is a problem with a sensor circuit.
@@cloutkingupnext4721 possibly. If the bias voltage isn't at the expected level it could indicate a problem with the solenoid, but it could (also) mean there is a problem with the wiring. e.g. a damaged/corroded wire. Don't fall into the trap of automatically assuming the device on the circuit is the problem.
Excellent. The general code of p0440 makes me think of a wild chase for a fix but we must begin somewhere. Its not the 5 gas caps that each mechanic has replaced. lol Thank you so much.
I learned something new, and that is what counts... that and my car takes fuel again, is also important, and I didn't have to pay a mechanic also important. Learned something new, fixed my car and did it for free are the important things. And I didn't get stranded without fuel would be the fourth... the four important points are.... thanks bud. Keep up the good work.
We've been in producing for decades, have to say my friend you did a fantastic job of presentation and explanation. I went looking specifically on how test a solenoid on an evap canister, look what I found. Thanks! Great vid.
Yep that was the best explanation of the evap system I have seen. Only problem I see is the drawing specifically the hoses going in/out of the canister(the vapors would not be cleaned). The vent hose should either go from one end to the other (from top almost all the way to bottom)or have a physical barrier going almost all the way to the other end of canister(from the top almost all the way to bottom) separating it from the other two hoses forcing the vapors to go thru the charcoal and then thru vent) The hoses for the purge and tank should be going just to the top into the canister (same chamber/not going thru the charcoal). The way you drew it - all hoses are in the same chamber and nothing would be cleaned.
Great tutorial. It gave me an idea for further troubleshooting since I have a pesky P0440 and P0446 issue. I will check for ground continuity and partial solenoid closure/leak since I've verified power is supplied and the solenoid "clicks" when bench tested.
Love your drawings, always spot on for the video. Your explanations of systems and symptoms are always complete and informative without running long and droning on.
Glad to hear you like the quality of the video's, I've gotten better at presentation and editing over the years. It is alot more work on my end but the final result is better for the consumer. cheers
Great video. I just did a smoke test on a 2014 elantra and I commanded the vent valve closed, but smoke was pouring out of the fuel door. Customer had already replaced the gas cap and the gasket between the filler neck was shifted all the way to the front of the car and off center. I assumed that was it and ordered the gasket, but now I found out that the vent valve recirculates back into the filler neck instead of outside the car! I am going to pick one up and test it is sealed when closed and replace the gasket on the filler neck and realign it. Such an unexpected system made the test inconclusive.
Let me add to this video that the testing of the selenoid cables is very important. I spent almost 1000 dollars trying to fix a P0401 code on my Tacoma almost 3 years ago only to find out yesterday that a cable connection was the problem. Wiggle very gentle in different positions while testing it.
That's a really good explanation, Thanks, I think you could add that on start up the computer puts ground to the vent solenoid and closes it so a leak test is done on the fuel system. Vacuum is pulled by the engine and if the tank has a leak (loose cap, cracked hose or leaky or non closing vent solenoid) a code is set and check engine light comes on. Feel free to correct me if I'm wrong. Thanks again.
Great video!! Just an FYI... There will sometimes be a slight charge on the ground side of a circuit. This is called a " static charge". When you touch your test light, or anything conductive, to it.. It's called a " static discharge".
I enjoy your videos... had issues with my XC90... a hose just came lose but not completely... u would have saved me a load off time it your video was made a year ago... thanks again for your informative videos
Thank you SOOOO much for this video!!! I've been trying to find a vacuum leak for almost 18 months and I couldn't and every shop I took it took said their wasn't one bit I knew from the rough idle there had to be a leak.. And finally it's found!! Thank you so so much... My car never threw a code bc the electric solenoid was working fine, but the diaphragm on the other side wasn't holding a vacuum and there for gave me a vacuum leak.. I really hope this video helps others like it did me... Thank you again - Ive learned a lot watching ur videos...
My engine stalls occasionally (diesel 220cdi merc) and then recovers within secs whilst driving or may die if ticking over...could a blockage in the evap system cause this?
@@Infinitpossibilities take the purge valve off, carefully; then get a $13 pressure/vacuum gauge from harbor frieght store, and connect Vacuum/pressure gauge line to canister purge solenoid/valve's "air output side" hole, then blow air into (or try to suck vacuum air) the Vacuum side hole of the purge valve. If the Vacuum gauge needle moves while you are blowing air into the purge valve, then your Purge Canister Valve/Solenoid is Leaking. If you get Free Shipping (go Amazon). If no free shipping, probably best to go to DIY friendly AutoZone and also Register on their website to get Free access to their Professional Repair Manuals (they recently purchased national auto repair manual company).
I have been working with my 1998 Astro Van AWD 4.3L LT. Man! I have been trying very hard to comprehend how this evap system works, so that I may narrow down the reasons for PO Code 122, 452. I was looking at my Solenoid underneath near the Charcoal cannister. I tested for power as you demonstrated. That showed power! However, as the solenoid is original equipment, I wondered about it. I could not hear any clicking, and I disconnected the power from it, and the car ran the same, then it would die after a few minutes. Reconnected the solenoid, and the same problem, the car would idle fine, then in a few minutes it would die. I follow your testing advice by removing the solenoid and test for the sound of clicking using an external source for power. Your video is the one and only video I have found that actually describes in detail what's going on with the pressure system. THANK YOU VERY MUCH! I am subscribing! You have answered some important questions I have had. Hope to learn more. EXCELLENT JOB! WELL DONE!!!
For the gas cap small vacuum leak, you can replace your gas cap with an OEM one and still not solve the problem if your filler pipe lip is corroded. It must be smooth or you are going to spend a lot of money on gas caps.
Thank you for the overview of how this is _supposed_ to work. Are gas vapors so prolific that they needed to create this horrific overly complicated EVAP system? I understand one-way valve letting air in for gas burnt so it doesn't create a vacuum. I don't understand the reason for a purge out of air, which looks to be where the complexity comes in, in system design, maintenance and repair.
I had 3 codes, I fixed two, and this one is the one that is giving me problems, but I will use my test light to see if I get any voltage. Thanks for the info. Very helpful.
Very cool advice. Thank You for this information. My car got rear-ended and the code identifies this as the issue. So I guess when the car hit me, it damaged this component.
Thank you for this informative video. I recently brought my Prius to the shop and had it pressurized with a smoke test and found no leaks I suspect that it could be the vent solenoid. The check engine code was P0456 which is EVAP small leak! The car will be going back to the shop a second time to confirm this.
I like the video. The reason why you have voltage on both side of the vent solenoid is because the PCM hasn't put the ground out for testing. Therefore, there will be voltage on both side of the coil and the solenoid is open. When the PCM puts out the ground for testing, the solenoid will then close.
Best video ever and great illustrations! I always learn a lot from these videos. The Mrs. on the other hand: well you put her to sleep. She knows what time it is when she hears "Hey do it yourselfers!" If she is really having a hard time sleeping I will watch your AC video. That one really knocks her out!
Thanks for the video. Mine is a 2007 Sub with only 74 miles. Check engine light turned on with OBD code P0446 (Evaporative Emission System Vent Control Circuit 1/1. I've replaced the gas cap, vapor vent canister valve, vapor jumper wire and the Emissions Vapor Canister Purge Valve Solenoid EVAP Vent ( I don't think it's necessary but I did it anyway). Cleared it and the check engine light is gone but after driving 93 miles, the I/M is still not ready with a combo drive of city and fwy. Drove it for another mile and after 6 cycles, when I ran the OBD at 94 miles to see if it's I/M ready, unfortunately I see the same "pending" P0446 code despite driving it up to 110 miles hoping it will clear on it's own. So I decided to erase the pending code/OBD and did the same thing again. Drove it up to 92 miles without check engine, still not I/M ready and at 94 miles later it's still not ready and the "pending" p0446 code is back. Replaced the vapor vent canister valve, vapor jumper wire again just in case I have a bad part, but unfortunately pending P0446 code is back. I'm hesitating on replacing the vapor vent/big box like cause I don't have issue filling up gas and no gas odor around the area too. Could it be the fuel tank pressure solenoid? I hope not... cause I know this is pretty common on the 2006 but not on the 2007. I'd appreciate yours or anyone's.
I've watched several videos on this subject - got the dreaded check engine light, cleared it and it came right back. Your video explained the subject very well. Thank you. Now could you come on over and test mine for me? Ha! Thanks for being clear and providing a easy to understand illustration. Peace!
thanks …. tracking down a P0300, multi misfire. been ignoring my evap and o2 codes, and they are catching up with me. Truck is up in the air, and moving forward with smoke detector . Your description is helping mentally map my issues ….. thanks
1 more reason the you’d get a P0994: I found I had a leak at the tank where the hose connects to the charcoal canister. So basically, the PCM thought the vent solenoid wasn’t closing, when it was actually a huge air leak that made it seem that way. Thanks for the explanation and the code list in the description. Between you and BriansMobile1, I know everything about my evap system!
Very nice and informative description of evap system. I have a 2002 Mercedes Benz CLK55 and got a check engine light for codes P0170/P0173 Fuel trim Bank 1 & 2. I was going nuts looking for a vacuum leak. The only thing I have not checked is the evap system and those valves. I hope my vent valve is stuck open and causing my fuel trim issue. I bet it is. Oh just one thing more. I have a 2001 E55 that sat for 5 years and gas went bad. Drained bad gas, R&R fuel pump and filter, but now the gas tank is pressurizing which makes it "Hard Start" condition. I suspect also a vent solenoid but stuck closed. Thanks for the valuable comprehensive information!
Man you are so knowledgeable. I trust every word you are saying. I don't know what the hell your talking about. But you know what.. you sound so knowledgeable. I trust you.
The very first time I laugh out loud watching a mechanics video. Thanks a million, your clear and concise explanations allowed me to finally understand the EVAP system!
Excellent video with clear explanations and great graphics. Very helpful. You have talent and should consider becoming a teacher. Thank you for making this video.
Awesome! good teacher I love the graphics and the possible reasons why the gas is not going thought the system. I think is 200% beneficial is audio and visual explanation.
Swearing or no swearing ,you still one of the best reviewers on youtube.Nicely explained so most of us can understand.Keep up the work,most of us are extremely grateful and appreciate it.
Clear illustrations. Detailed explanation. Good vid quality. No distraction. No noise. No shaking camera. Excellent. Thanks a lot.
Thanks for your comment, glad to hear you see the work that goes into these videos. cheers
💯
I agree great Video... I learned so much in my time of KIA ordeals
If anyone is having trouble pumping gas in this model car, you definitely want to check the filter tube vent. This is located driver's side rear wheel well. You will have to remove the wheel to get access to the plastic shroud in the wheel well. The filter tube vent is located behind there. You'd be surprised how much road debris actually gets trapped up in there despite it being covered. When I cleaned mine, I removed a dustpan sized pile of dirt and sand. In my case, cleaning that filler vent did the trick allowing me to pump gas, and not have to do the "flip the gas nozzle upsidedown" trick in order to pump gas. 3 years since and still pumping gas fine. Just a quick tip no one really talks about. 😉
My code says that my "Evap canister purge vent" is blocked. Do you know how I would fix that?
@@codyshuey258
Search RUclips with the year make and model of your car, and evap canister vent valve/solenoid.
On a 2001-2006 Hyundai Elantra that valve/solenoid is located in the charcoal canister housing located left rear...under the bumper and behind the left rear wheel. Open the housing, disconnect the hoses, and check for charcoal or any other blockages in the valve and in the hoses connected to it.
Might possibly be your valve is stuck closed and unable to open and close as needed. If that's the case, a replacement would be needed and is fairly simple and inexpensive.
Sorry, if that's not the info you're seeking. Good starting point at least.
Good luck.
Very helpful video. I am a tool & die maker in the automotive sector. When I asked this error code to be explained, I was told things that made no sense. The more clarification I asked, the more I realized I was being sent down a rabbit hole of being ripped off at a Ford dealership. Can't stand these repair sales folk who think they can sell a story to anyone and everyone will believe them. Thank you for the enlightenment.
half the time the service advisors have no clue of a cars systems and how hey work exactly
@@reweydewy Verbally, when it comes to large leak, they tell me their guessing which part, as they've replaced them one by one. Now that I want a state waiver from any more evap bills, in writing, it says "Customer is refusing general diagnostics." ?!?
Exactly prepared for 2 cat converter buys
And loss of cars cat converter
I've watched 15 or 20 videos concerning EVAP System problems (PO447) yours is the only one that helped. Great illustration, great description, and good videotaping. Thank you!
You are seriously the hero of the day. This just saved my butt completely. After checking the wiring and replacing the solenoid With no luck of getting rid of the code, i watched your video. Unhooked everything and dropped the Evap canister blew air into it to see if it was clogged. Seemed fine. Traced the hoses back only to find dirt packed completely in the outside vent. Looked like the vent cover may have been reinstalled upside down by someone so it was able to fill up like a cup. Anyways thank you so much ! Blessings
Awesome I have to check my system when I put gas in my car an O2 Kia Optima V6 it keeps popping off you guys are the best
That happened to my aunt's '05 Sedona. She took it to a mechanic down the road and he said it needed a new cam, lifters and a head job. I put my code reader on it and she told him to hold off and replace the solenoid. he did and it's still running great.Thanks for making this video...!!!
That has to be the worse diagnosis of a bad vent solenoid that mechanic did on your aunt's Sedona..lol
Guess he had a boat payment due.
Hope she found a good mechanic! This doesn't sound like one!
love all your videos!! being a women who is tired of machanics taking advantage of women !! you are on my top 5 machanics i go to when i have a problem. I enjoy all the videos i have watched !! Thank you so much!!
The best video of a mechanic swearing and explaing how things are done. Amazing tutorial!
This is the best explanation of the EVAP system I've seen.
Glad you like the video, thanks for commenting.
code p0621
Dammit, when will the Czech's build an OBDC scanner protocol proxy device that continuously sends a reset to the car's computer while at the same time sends a "We're cool here, nothing to see" output to the DMV's connection? Because sending perfectly running and SAFE cars to the crusher due to yearly DMV crucifixion is killing us.
Your smart. Thank you for your contribution
@@johnsaccoccio7373 I'm fairly close to that (perfectly running and safe, sent to the crusher) myself. Dealer and mechanics can't resolve P0455, for the past 2 years. I don't understand the necessity of having the system open for purging. Closed fuel system with one-way inlet of air to avoid vacuum, would seem to do the job.
Your approach is so effective that for every problem, like no one else, you make a schematic to explain it’s principle of working. 👍🏻
I know this is old, but thank you. Been looking at this, everyone talks about replacing the various parts, but no one shows a simple schematic of how the system works. Best info I've found in several hours of searching.
Love this guy's videos, great quality and legitimate explanations and breakdowns. I've talked to other "professional" mechanics that can't give a clear breakdown on issues. You have helped me turn into a pretty competent DIY mechanic for myself, family and friends
Just changed Vapor purge solenoid P0456 2006 Grand Cherokee 3.7l....took 1 min and smoothed out my idle. saved me $200, Thanks.
Fastest 200 I ever made. Better to be in my hand than than the dealers cash machine.
Cussing while working on an evap system is required for a good repair!
Cussing is a necessity!
@@pothead503 That's right, Dammit!
Remove evap system, substitute vehicle.
Routine maintenance is optional.
Cold beer helps the job go smoother.
Check
This 10 min was more entertaining and informative Than season 4 of fast n loud . I swing from your knowledgeable sak brother Thanks
Well done, very well done. My dad was called Maestro by all his friends when fixing their cars in our garage drinking bear. I can say that your friends and myself can and should call you Maestro. You explain the process very well thanks for the info.
Wow....various garage guys have been throwing vocabulary at me for a week now. I'm not a helpless girl when it comes to cars but the whole thing was getting on my nerves. THIS was an AWESOME explanation. We'll be able to get the car to pass inspection now that we know what to look for and replace/repair. THX!
Tanks also have pressure sensors that the PCM uses to determine how much vaccum pressure the tank needs, in order to know what signals to send to the purge valve and the vent solenoid. The gas caps is also vented to let in fresh air to the tank upon vaccum pull from the PCM. Caps determine open or closed based on vaccum and gas pressures and vary based on tank pressures.
14 year old Suburban with 235k miles. Never had any issue with evap system until recently. Have the evap system small leak 0442 code. Suspecting one of the valves or charcoal or maybe a line leak/connection. Don't have a smoke machine so might just have to be hit or miss . Don't know how that charcoal has been effective at filtering vapors over that timeframe! Not complaining. Great video. Thanks
This video was very helpful. I been having problems with my Jeep Grand Cherokee Laredo 09' I thought it was my spark plugs and cord's and spark wires. So I changed them and the problem got bad. So I drop my gas tank and changed the fuel pump and still was acting bad. So I read up on it and now I probably know it's a bad purge valve. But I'm glad I changed everything myself and I'm learning as I go along in life.
this guy is great ,out of most videos i have watched , he is the only one that explains everything where i can understand , thank you ,
Thank you for this video! I had a P0442 code and was doing all kinds of research trying to diagnose it. Your video helped me understand the evap system better and I was eventually able determine it was the vent valve. Apparently I backed into something and damaged it. Anyways, I replaced the valve (and some other evap components) and yesterday I passed smog :D Again, thanks for this video and the great info you provided!
Thank you, Thank you, Thank you! I’m having these exact symptoms on my 2013 Ford Fusion and I’ve already purchased a replacement vapor canister vent valve but I didn’t fully understand how it worked/how it would give me these symptoms! But thanks to your video and diagram, you have given me all the information I need to fix my issue! Great job sir!!!
You did a really good job explaining this. I was struggling to understand the vent solenoid until now.
cursing part was funny too
😖 Thanks Ratchets and Wrenches. I appreciate the cursing, your experience and the fact you've maintained your hotness throughout the presentation
Your humor is very funny but it is also perfectly portioned. Keep that balance.
$400 new oem canister on 95 maxima
I have watched several videos to get my head wrapped around the evap system because I have to know how the step I am doing is affecting the entire system or pause the video after step execute it, and then listen to desired outcome. If they don't match, I still can't diagnose because I am not familiar with the terms. Your explanation of the entire system fixes all that. Thank u sir.
Awesome detailed video! Exactly what I needed....I like the way you draw out diagrams and make them simple enough a simpleton like myself can comprehend...I had code P0449 and followed your instructions...I bench tested it with my power probe and get 12v on hot side and 0v green light negative on control side, however I don't get an audible click whatsoever when I supply 12+ v through my probe..I also used my bi- directional scan tool to help troubleshoot and test, still no click! I'm gonna buy a new vent solenoid.... thank you.
Best video in RUclips on the subject.!!
That voltage on the Ground side is called Bias Voltage. It is a common technique in circuit design to detect if there is a problem with a sensor circuit.
Potentially telling you the sensor / evap vent is bad right?
@@cloutkingupnext4721 possibly. If the bias voltage isn't at the expected level it could indicate a problem with the solenoid, but it could (also) mean there is a problem with the wiring. e.g. a damaged/corroded wire. Don't fall into the trap of automatically assuming the device on the circuit is the problem.
concise and clear statement about how the evap system operations and how it works. Thank you.
Your my favorite teacher of auto mechanics. Thank you!
Excellent. The general code of p0440 makes me think of a wild chase for a fix but we must begin somewhere. Its not the 5 gas caps that each mechanic has replaced. lol Thank you so much.
Man !!! This is great example and explanation it’s like watching Sesame Street, for grown men.
I learned something new, and that is what counts... that and my car takes fuel again, is also important, and I didn't have to pay a mechanic also important.
Learned something new, fixed my car and did it for free are the important things. And I didn't get stranded without fuel would be the fourth... the four important points are.... thanks bud. Keep up the good work.
We've been in producing for decades, have to say my friend you did a fantastic job of presentation and explanation. I went looking specifically on how test a solenoid on an evap canister, look what I found. Thanks! Great vid.
Yep that was the best explanation of the evap system I have seen. Only problem I see is the drawing specifically the hoses going in/out of the canister(the vapors would not be cleaned).
The vent hose should either go from one end to the other (from top almost all the way to bottom)or have a physical barrier going almost all the way to the other end of canister(from the top almost all the way to bottom) separating it from the other two hoses forcing the vapors to go thru the charcoal and then thru vent)
The hoses for the purge and tank should be going just to the top into the canister (same chamber/not going thru the charcoal).
The way you drew it - all hoses are in the same chamber and nothing would be cleaned.
Great tutorial. It gave me an idea for further troubleshooting since I have a pesky P0440 and P0446 issue. I will check for ground continuity and partial solenoid closure/leak since I've verified power is supplied and the solenoid "clicks" when bench tested.
Was looking forever for the in depth explanation of why my car wasn't taking gas. Thank you for the info. Greatly appreciated.
I pured your language .you did a good job explaining how the system works thank you .
First video I see somebody taking the time to describe evap systems on Hyundai..Excellent !
Real nice explanation of the evap system. Now I know where to start testing for my code error. THANKS !!
Thank you. Thank you thank you thank you. I bought a project car and no nothing a bought mechanics. This is so helpful and I’m a fan!
Love your drawings, always spot on for the video. Your explanations of systems and symptoms are always complete and informative without running long and droning on.
Glad to hear you like the quality of the video's, I've gotten better at presentation and editing over the years. It is alot more work on my end but the final result is better for the consumer. cheers
Great video.
I just did a smoke test on a 2014 elantra and I commanded the vent valve closed, but smoke was pouring out of the fuel door. Customer had already replaced the gas cap and the gasket between the filler neck was shifted all the way to the front of the car and off center. I assumed that was it and ordered the gasket, but now I found out that the vent valve recirculates back into the filler neck instead of outside the car! I am going to pick one up and test it is sealed when closed and replace the gasket on the filler neck and realign it. Such an unexpected system made the test inconclusive.
Quality videos with a mature teacher. A1
Very good and concise explanation of the EVAP system. I was able to diagnose a bad vent solenoid and was back on the road shortly after. Thank you!
Let me add to this video that the testing of the selenoid cables is very important. I spent almost 1000 dollars trying to fix a P0401 code on my Tacoma almost 3 years ago only to find out yesterday that a cable connection was the problem. Wiggle very gentle in different positions while testing it.
This is probably the best video on YT explaining how Evap System works 👌👌👌
That's a really good explanation, Thanks, I think you could add that on start up the computer puts ground to the vent solenoid and closes it so a leak test is done on the fuel system. Vacuum is pulled by the engine and if the tank has a leak (loose cap, cracked hose or leaky or non closing vent solenoid) a code is set and check engine light comes on. Feel free to correct me if I'm wrong. Thanks again.
This is the best explanation I’ve seen and I’ve watched 12 videos on this topic
Great video!! Just an FYI... There will sometimes be a slight charge on the ground side of a circuit. This is called a " static charge". When you touch your test light, or anything conductive, to it..
It's called a " static discharge".
I enjoy your videos... had issues with my XC90... a hose just came lose but not completely... u would have saved me a load off time it your video was made a year ago... thanks again for your informative videos
Thank you SOOOO much for this video!!! I've been trying to find a vacuum leak for almost 18 months and I couldn't and every shop I took it took said their wasn't one bit I knew from the rough idle there had to be a leak.. And finally it's found!! Thank you so so much... My car never threw a code bc the electric solenoid was working fine, but the diaphragm on the other side wasn't holding a vacuum and there for gave me a vacuum leak.. I really hope this video helps others like it did me... Thank you again - Ive learned a lot watching ur videos...
William penrose where did you find it at
My engine stalls occasionally (diesel 220cdi merc) and then recovers within secs whilst driving or may die if ticking over...could a blockage in the evap system cause this?
@@Infinitpossibilities take the purge valve off, carefully; then get a $13 pressure/vacuum gauge from harbor frieght store, and connect Vacuum/pressure gauge line to canister purge solenoid/valve's "air output side" hole, then blow air into (or try to suck vacuum air) the Vacuum side hole of the purge valve. If the Vacuum gauge needle moves while you are blowing air into the purge valve, then your Purge Canister Valve/Solenoid is Leaking. If you get Free Shipping (go Amazon). If no free shipping, probably best to go to DIY friendly AutoZone and also Register on their website to get Free access to their Professional Repair Manuals (they recently purchased national auto repair manual company).
This video made more sense to me then all the mechanics I have spoken to regarding my Evap issue
Thanks for the complete explanation of this relatively complex system.
I have been working with my 1998 Astro Van AWD 4.3L LT. Man! I have been trying very hard to comprehend how this evap system works, so that I may narrow down the reasons for PO Code 122, 452. I was looking at my Solenoid underneath near the Charcoal cannister. I tested for power as you demonstrated. That showed power! However, as the solenoid is original equipment, I wondered about it. I could not hear any clicking, and I disconnected the power from it, and the car ran the same, then it would die after a few minutes. Reconnected the solenoid, and the same problem, the car would idle fine, then in a few minutes it would die. I follow your testing advice by removing the solenoid and test for the sound of clicking using an external source for power. Your video is the one and only video I have found that actually describes in detail what's going on with the pressure system. THANK YOU VERY MUCH! I am subscribing! You have answered some important questions I have had. Hope to learn more. EXCELLENT JOB! WELL DONE!!!
For the gas cap small vacuum leak, you can replace your gas cap with an OEM one and still not solve the problem if your filler pipe lip is corroded. It must be smooth or you are going to spend a lot of money on gas caps.
Good job! Most thorough explanation of the evap system I've seen. I can stop looking now.
Thank you for the overview of how this is _supposed_ to work.
Are gas vapors so prolific that they needed to create this horrific overly complicated EVAP system? I understand one-way valve letting air in for gas burnt so it doesn't create a vacuum. I don't understand the reason for a purge out of air, which looks to be where the complexity comes in, in system design, maintenance and repair.
I had 3 codes, I fixed two, and this one is the one that is giving me problems, but I will use my test light to see if I get any voltage. Thanks for the info. Very helpful.
Many thanks. Very instructive and clear. Nicely done!
The best EVAP diagram on the net!
Very cool advice. Thank You for this information. My car got rear-ended and the code identifies this as the issue. So I guess when the car hit me, it damaged this component.
Thank you for this informative video. I recently brought my Prius to the shop and had it pressurized with a smoke test and found no leaks I suspect that it could be the vent solenoid. The check engine code was P0456 which is EVAP small leak! The car will be going back to the shop a second time to confirm this.
Another great informative and entertaining video from you. Keep your videos coming
will do, thanks for watching and commenting, cheers.
I like the video. The reason why you have voltage on both side of the vent solenoid is because the PCM hasn't put the ground out for testing. Therefore, there will be voltage on both side of the coil and the solenoid is open. When the PCM puts out the ground for testing, the solenoid will then close.
Awesome video/information. Thanks very much!
Best video ever and great illustrations! I always learn a lot from these videos. The Mrs. on the other hand: well you put her to sleep. She knows what time it is when she hears "Hey do it yourselfers!" If she is really having a hard time sleeping I will watch your AC video. That one really knocks her out!
THANK YOU BRO !!!! GREAT INFO / EXPLAINED PERFECTLY FOR DUMB AceSS LIKE ME, ME KEEP DOIN WHAT YOU DO !!!
The best explanation I've seen so far. Now, onward to fix my jeep!!
Thanks I learned a lot from your video first time Ive watched itI believe I’m going to subscribe once again thanks keep up the good work
Thanks for the video. Mine is a 2007 Sub with only 74 miles. Check engine light turned on with OBD code P0446 (Evaporative Emission System Vent Control Circuit 1/1. I've replaced the gas cap, vapor vent canister valve, vapor jumper wire and the Emissions Vapor Canister Purge Valve Solenoid EVAP Vent ( I don't think it's necessary but I did it anyway). Cleared it and the check engine light is gone but after driving 93 miles, the I/M is still not ready with a combo drive of city and fwy. Drove it for another mile and after 6 cycles, when I ran the OBD at 94 miles to see if it's I/M ready, unfortunately I see the same "pending" P0446 code despite driving it up to 110 miles hoping it will clear on it's own. So I decided to erase the pending code/OBD and did the same thing again. Drove it up to 92 miles without check engine, still not I/M ready and at 94 miles later it's still not ready and the "pending" p0446 code is back. Replaced the vapor vent canister valve, vapor jumper wire again just in case I have a bad part, but unfortunately pending P0446 code is back. I'm hesitating on replacing the vapor vent/big box like cause I don't have issue filling up gas and no gas odor around the area too. Could it be the fuel tank pressure solenoid? I hope not... cause I know this is pretty common on the 2006 but not on the 2007. I'd appreciate yours or anyone's.
Great videos keep making videos thank you
I've watched several videos on this subject - got the dreaded check engine light, cleared it and it came right back. Your video explained the subject very well. Thank you. Now could you come on over and test mine for me? Ha! Thanks for being clear and providing a easy to understand illustration. Peace!
Changed them all, it's my charcoal canister, and it is on top the tank.
Part over 100 bucks on an 04 grand prix, what a load of crap
Amazing!!! THank you! We live in good times with guys like you and RUclips to teach us!
Hey that was a good freaking explanation , o shit I cursed , ah damit !!
thanks …. tracking down a P0300, multi misfire. been ignoring my evap and o2 codes, and they are catching up with me. Truck is up in the air, and moving forward with smoke detector . Your description is helping mentally map my issues ….. thanks
Like you guys never swear!!! C'mon,,, that was hilarious
yup pretty funny I thought as well.
I don't swear since I had a radical encounter with the Lord Jesus Christ
1 more reason the you’d get a P0994: I found I had a leak at the tank where the hose connects to the charcoal canister. So basically, the PCM thought the vent solenoid wasn’t closing, when it was actually a huge air leak that made it seem that way. Thanks for the explanation and the code list in the description. Between you and BriansMobile1, I know everything about my evap system!
The subtitles picked up the profanity fine but missed a lot of the rest. Pretty funny.
lol
🤣🤣🤣🤣☠☠☠💀💀💀
Very informative. I found it easy to understand, with common-sense explanations. Got my car fixed myself when the garage guy couldn't! Thank you!
thanks guys not sorry bout da cussing lol😅😅
@@G3855-o5f Purge solenoid is bad. Or there's a leak between the solenoid and the intake manifold.
Very nice and informative description of evap system. I have a 2002 Mercedes Benz CLK55 and got a check engine light for codes P0170/P0173 Fuel trim Bank 1 & 2. I was going nuts looking for a vacuum leak. The only thing I have not checked is the evap system and those valves. I hope my vent valve is stuck open and causing my fuel trim issue. I bet it is. Oh just one thing more. I have a 2001 E55 that sat for 5 years and gas went bad. Drained bad gas, R&R fuel pump and filter, but now the gas tank is pressurizing which makes it "Hard Start" condition. I suspect also a vent solenoid but stuck closed. Thanks for the valuable comprehensive information!
Nice technical drawings...seriously. You should write technical/informational booklets. (I hope your mom isn't watching your videos.) : )
Man you are so knowledgeable. I trust every word you are saying. I don't know what the hell your talking about. But you know what.. you sound so knowledgeable. I trust you.
Could you do a video on how an EGR system works?
P.s. I found the swearing quite funny tbh 😂😂😂
I have an older video on the EGR system, check it out in my channel. Let me know if its good or not, maybe I'll do a redo of it. cheers
The very first time I laugh out loud watching a mechanics video. Thanks a million, your clear and concise explanations allowed me to finally understand the EVAP system!
" Do you ever have a problem putting gas in your car? Roll up your windows and eat at taco bell.
Asking for a bad day!
Excellent video with clear explanations and great graphics. Very helpful. You have talent and should consider becoming a teacher. Thank you for making this video.
3:50, the pcm is always a b**ch
Awesome! good teacher I love the graphics and the possible reasons why the gas is not going thought the system. I think is 200% beneficial is audio and visual explanation.
Pretty awesome and darn good. Rock on. Profanity don't suit you tho....
Probably one of the easiest to under stand videos.perfect
3:51 LMAO!
Not even my model or kind of car but this video is excellent. I really enjoyed watching it😊
Hey! watch that language
I can't thats just how I am.
This was the most helpful thong ever to understand what might be happening to my car. Thank you so much!