GM "P0455 Large EVAP Leak" - What To Check When It's Not The Gas Cap

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Come along with Eric O. and have a look at this 2008 Pontiac Torrent 3.4 with a "P0455 Large / Gross EVAP Leak." Now this a very common problem and is often misdiagnosed as a gas cap or a canister vent solenoid. In this video we have a look at the whole system from the canister vent, fuel tank pressure sensor and the often over looked purge solenoid.
GREAT EVAP VIDEOS FROM "WELLS TECH"
Wells TechConnect Ep.20--EVAP Leak Problem, But No Smoke is Found! (P0442, P0446, P0455) - • EVAP Leak Problem, But...
Wells CounterPoint Ep. 19 Evap System Problems...Where to Start (P0455, P0440, P0442) - • Wells CounterPoint Ep....
Wells CounterPoint Ep. 26 - P0446 Vent System Performance - Diagnose & Fix it Right the First Time! - • Wells CounterPoint Ep....
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Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not South Main Auto Repair.

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30 июл 2017

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Комментарии : 559

@jamieprice126 2 года назад

I have been a mechanic for 40 plus years and I would bring my vehicles to you for repairs if I lived in your area 2 thumbs up

@CarlosAGarcia97 3 года назад

"The money 💰 light is on " never heard that phrase before Never will Forget it !!!🤭😏

@masapell 7 лет назад

This channel is like taking an online college class for free! What a great explanation!!!!

@Jay_Dahl 5 лет назад

"The money light is on". That made me laugh. Great humor.

@kellyhouck3969 5 лет назад

True that!!!! It is the" Money light" it's on it's gonna cost ya lmao

@Mr_Ulm 4 года назад

I never heard any one, not even a Tech, say "money light" thats great! LMAO!! I will say that to my Tech next time i ask him to pull the codes. lol

@lildezyvert 3 года назад

ain’t that the truth lol

@scottieboy69 2 года назад

Depends on which side your on,mechanic, or owner. Wether you want to cry or laugh .....,.) =

@narrowhwy114 Год назад

Saw a bumpersticker on the back of a Ford explorer that had the money light on it with the message, "This little of mine, I'm gonna let it shine!"

@bryonhalsey6033 3 года назад

It's nice to see someone knows how to use the test equipment and understands how the system operates. That way he is able to diagnose the problem, fix it, and isn't just a parts changer. He has my vote of confidence, that I'd feel safe letting him, to work, on my vehicles.

@klwthe3rd 7 лет назад

Another great example of how an Actron alone will lead you astray. Understanding the data in the bidirectional scan tool is the key to leading you to the root cause. Great tip!

@wranglersdirect2803 5 лет назад

Wow I stumbled across your posts for the first time. I wish every one else's video was as thorough and informative as what you provide. Well done I hope your getting paid well for your above average ability. Thanks for the effort and nice Job Ann with your side of the video.

@SmittySmithsonite 7 лет назад

Great info. EVAP is one of my weakest spots in automotive diagnostics. Been learning how it works in bits and pieces from you and Paul D. over the past year or so. Glad you used the Autel so I know where to go on GMs now. THANKS!

@josephmoniz4109 4 года назад

Great job explaining the issues with these EVAP codes. I wish I had the scanner to switch solenoids off/on command. That really helps the diagnostics move along quickly.

@wendwllhickey6426 Год назад

Those valves always stick open or closed they have trash in the valve that makes them stick

@waynemintz5361 2 года назад

I love watching you , I own nothing new, But watching you, you have steered me in the right direction to find my problems with my 1994 Plymouth Grand Voyager 3.3 engine , my 2004 S Type Jaguar 3.0 engine and a 1999 chevy Truck 454 engine. I have my hands full trying to keep everything going. You are GREAT thank You.

@epipolarus 7 лет назад

Impressive work! I don't own any GM cars, but I still learn something from EricO, every time. In my opinion, Eric O is the best mechanic on youtube. If I could find a mechanic like him, I'll quit DIY.

@knobrush 5 лет назад

My father has an '03 Chrylser Town & Country 3.8L and it has P0442 and P0455. "Upon visual inspection" I found a brittle gas cap gasket and two split hoses in the evap system (luckily within easy reach). New oem gas cap and a bit of fuel line...good as new and only cost $20.

@satamanschmidt3428 7 лет назад

Very good Eric. Simple, direct and to the point with solid explanations as to what's going on. Denny liked it. AND it was a lot more interesting that watching you solder wires for two hours.

@elcheapo5302 7 лет назад

Any day that starts with a new SMA video is a good day. Thanks, Eric.

@johnclunan4488 26 дней назад

Wish I lived closer to bring our cars to him, always a Masters Class

@natetransitions8379 3 года назад

I have a p0441 instead for "incorrect purge flow" but this video really helped me further understand how to command with scan tools and what to look for. Thank you.

@chrisl4999 2 года назад

My vehicles money light came on and the local guy wanted $1500 to replace the evap solenoid, canister, and 2 o2 sensors. Watching your vids, i did it myself in a couple hours and $200 in parts. Thanks!

@govindagovindaji4662 Месяц назад

"Money Light" ~ lol, you got that right. Very clever & funny~!

@xelaju8 3 года назад

I like your scanner. I am sure is an expensive one. Most people would get bored watching this but I definitely understood what you did. I recently had to change my evap line from the canister to the purge solenoid and got rid of the mil. I had to learn how the emmission control system works here on youtube. The good thing is that I have a strong background in electronics and HVAC. which helped me fix these issues on my Chevy Cobalt 2009 and save me some money. You are right We can do it. Thanks for sharing your knowledge. Nov 2, 2020

@wysetech2000 7 лет назад

Evap testing and repair simplified. Nice job, Eric.

@ocrun6765 5 лет назад

Smart evap diagnostics!! Thanks for making this video.

@GoTechTraining 7 лет назад

Great vid showing a purge issue. Leak codes can be deceiving! I love the test where you close the vent and see if you build pressure or vacuum. What a quick easy way to verify if a leak is present. Have you ever run into issues where the scan tool times out before you are certain of a leak being present or not? Thanks for the links! ~Mike

@lukecartwright1803 7 лет назад

Im so grateful that u started making youtube videos!!! I truely am. U are just a natrual at it.

@MrThebrinksman 5 лет назад

You are the man! Very informative and extremely helpful. You have helped me through what I needed to know. Things that the book won’t even attempt to explain. Thank you very much!

@buzoff4642 4 года назад

"Very informative" Good! How does failure to purge, equate to "large leak"? Bad software?

@andrewtheautotech 3 года назад

@@buzoff4642 the computer sees the pressure not changing because the purge is closed so that registers to the computer that there is a large leak because if there was a large leak pressure would stay the same

@buzoff4642 3 года назад

@@andrewtheautotech So, bad simplistic software. Leak, invoke pressure and pressure does not rise, or rise above X. Bad purge valve, pressure rises but then does not drop upon OpenValve.

@andrewtheautotech 3 года назад

@@buzoff4642 yes exactly. That would be the only way it would make sense for it to throw the code in this scenario. Crappy computer logic to me.

@buzoff4642 3 года назад

@@andrewtheautotech Yes. And furious use of our cars is hostage to it: Check engine on, no inspection sticker, no legal use. Worse, local mechanic said OBD was for purpose of emissions and safety, but now includes items that are neither emissions nor safety, but merely less than optimal performance. Really chaps my hiney.

@stacydornan9765 5 лет назад

Once again another spot on diagnostic, your the man Mr.o.Good job bro

@JD-526 3 года назад

Excellent I'm going to do the same test with my truck because my check engine light kept going on and off at different fuel levels, I hooked my Verus to the truck just now, and it said I had a large evap leak again. This is the second time I had that code come up, So we'll see. ( Update ), did the same test on my Silverado the purge valve was bad, was able to bring it back to life by tapping on it. Thank Eric you are the man.

@noelcastle3986 2 года назад

Another great diagnosis with well explained procedures and system.ooeration . I could see how it could easily be misdiagnosed. Interesting how you could see the PWM making the test light flicker must run a very low PWM frequency .

@benjaminstockton3431 7 лет назад

No smoke, No brake clean Good job Eric o. Thanks for video's

@fauxhawksexipapi 5 лет назад

Bro I swear to god, I was stressing out for an entire year and you gave me the answer that I needed I knew I would find the answer in one of these videos, thanks so much, you have a new subscriber

@Maxim.Teleguz 2 года назад

What was the answer and did you actually do a repair.

@terrancedesormeauxjr2559 5 лет назад

You my friend just saved and helped me diagnose this problem on my 05 Tahoe. Subscribed

@Sandbag1300 7 лет назад

Nothing like waking up to a game of whack a mole with the purge solenoid. Great diagnostic. Thumbs up video.

@jrbird7571 2 года назад

Great info! Thanks! I went from a PO449 to a PO455 after I replacing the evap vent solenoid on a `08 Corvette. I verified that it was faulty by applying 12V to it. I'm going to replace the gap and if that doesn't resolve the LARGE leak, this will help!

@joerhodes6626 3 года назад

Very good video. Absolutely very informative. helped me solve a problem on a GMC Terrain that was just driving me friggin crazy!!! Thank you.

@STREETSTANG07 7 лет назад

Thanks again Eric always very helpful especially when using the Autel ms906. I had same problem on a 2009 Kia Optima the guy was throwing parts at it looking for someting big and one give away was he said hard starting after fill up. Thanks again. P.S. I'am doing a head gasket on 2006 Subaru Forester your video on that was the best. The newer one have a variable rocker arm timing but still pretty basic.

@shawnwithee6336 2 года назад

Thank you for your simple but somewhat confusing explanation of a problem I seem to be having with my 2003 gmc envoy sle. I don't smell fuel or see any signs of leaking from hoses or tank but my truck seems to lose gas fast most of the time so that's why I said confusing. I'm old school mechanic now I'm just a parts changer with the valuable advice from you a true professional mechanic. The Mackey mouse code readers from local auto parts store don't give in depth troubleshooting like you have here. I grew up with Chilton manuals and no sensors and plastic parts with over thought bad designs. I will change my evap sensor when I get the extra cash and again thank you for this video your time and freely giving your knowledge to me the guy that can't afford someone else to do what I can and like to do myself.

@GlycerinZ 7 лет назад

If you inspect your purge solenoid and you see charcoal bits, make sure you replace your charcoal canister in addition to the solenoid! Don't just replace the solenoid or the bits of charcoal will cause it to get stuck open. Happened to me in my Trans Am

@danalarose846 3 года назад

You may have just found the problem ive been having for 7 years, thank you.

@yoiamthedude 6 лет назад

Excellent info video, Been scratching my head with problem for weeks. Bought the new evap solenoid and sure enough that was it. 2003 Jeep Liberty Many Thanks!!!

@dentondunn4346 2 года назад

I'm having a large and small leak on my 03 Liberty. Did it cause yours to run lean on bank 1 and make it through a 02sensor code as well? I'm having those issues

@Twiggztravesty 3 года назад

So very helpful and informative. Very great explanation for how and why things are acting the way they are. Thank you.

@aim321fire 6 лет назад

"All you have to do is wack it with screwdriver lady!" Too funny..Haha

@billrimmer5596 7 лет назад

What I meant to say first was. Super good video. Very comprehensive way to check out evap codes. Will b consulting on a regular basis. ThAnk u!!!

@trackerrrr 5 лет назад

Thanks for the great video. I have a buddy with an '05 Equinox that is doing this randomly with a new gas cap so now I have a good idea what to look for.

@KingOfKYA 7 лет назад

On older cars also good to check the filler neck hoses, my sister explorer hose was bad enofe i crushed it into dust with my hands. then the evap issue went away after i got a new one.

@nicholaswilson5671 7 лет назад

Another day in the life video needed. More snapon of matco tool truck visits, or a toolbox tour video

@gordonfreeman5434 7 лет назад

Eric O is the Jedi master of the auto repair world.

@baxrok2. 7 лет назад

Very useful information sir! Thanks for showing us how it's done!

@rrmech11 7 лет назад

Eric I really enjoyed the refresher in the GM evap system

@HToWnRePPiiN 5 лет назад

So I replaced my purge solenoid, drove it like 120 miles, light still remained on.. I then went to youtube, watched this video, went outside and checked my brand new purge solenoid and realized it wasn't sucking, tapped it a few times and it kicked on and it made me feel like a million bucks lol. Drove about 65-70 miles and check engine light went off! THANK YOU!!!!!

@buzoff4642 4 года назад

Oh man!, is that bad news. New one is bad???

@1995jug 7 лет назад

Good fix Eric, glad you brought up the issue on notifications mine started working after that video.

@marcinmorris 7 лет назад

You're like 5 stars hotel among surrounding motels ;) Best as always!

@jmcenterprises9591 7 лет назад

I need one of those code scanners. Thanks Eric O for another great vid.

@GNX157 5 лет назад

Back in the mid to late 80's I replaced a shit ton of purge valves on the 307 Oldsmobile engine. The diaphragm inside would leak and allow tank vapors to pulled thru to the vacuum control source. Every car that came in with that engine, we'd check it first thing, regardless of what the complaint was, that's how bad it was.

@thinman8621 5 лет назад

Always appreciate help with evap systems. And hope it's not BWD when you replace the failed part.

@stevethatcher599 2 года назад

Best comprehesive video on common evap issues I have reviewed.

@Matbug1812 5 лет назад

Thank's! I was curious about the rate of decay. Question answered!

@ivanmanzo9207 3 года назад

My 08 avalanche had this issue, spent couple hrs looking for leaks with no luck. I'd u don't have the scanner to do it, just unhook the hose from the solenoid to the intake with engine running. Plug the intake port and try to suck air from the solenoid . if u cant, then ur solenoid is bad even if it clicks. Great video. Can't thank u enough!

@pontiacsrule8761 3 года назад

Another great video my friend. That always drive my nuts with those evap codes

@DJR5280 7 лет назад

You're on a GM upload frenzy lol. Love the vids.

@razor4059 2 года назад

Thank you for the detailed troubleshooting! Loved it!

@afterhoursfab 5 лет назад

Broke When Delivered! Awesome. Thanks for the EVAP info too ;)

@motorcyclesandridingfree2899 7 лет назад

Wow first to hear of somebody rotating gas caps lol that is hilarious. Good job Eric

@sheldonbryan5521 7 лет назад

Big help for me thanks. I have an 05 equinox with the same engine. I've had to change out the purge solenoid on it. Now I'm having the same issue on my daughters 04 pt cruiser touring edition. 🙈

@jwilkers1 6 лет назад

Thanks for another great video I needed some procedures and better understanding on EVAP

@waterguy5924 3 года назад

Great Explanation Eric...never disappointed !!

@walter.bellini Год назад

Thank you for the great video Enjoy the process that you explain as you go through trying to find the issue.

@2eagle86 7 лет назад

Man it was boring all weekend without a video! about damn time a video was posted!!

@user-yf4nk8un2n 4 месяца назад

Brother keep doing videos like that!!! Always explaining cause/options good job

@kylewoodward7078 5 лет назад

The money light is on...lol..love it. That's the damn truth!!

@jamiebaltazar 3 месяца назад

Good job! You explained real good and described ecm codes!

@wmshannahan 5 месяцев назад

You did a great job in explaining you process. And now I'm pretty sure on what I have to do next. 13:25

@harleyadam4813 7 лет назад

Great diag! EVAP codes can be a real bear to track down sometimes.

@SuperFatrock 6 лет назад

I've had the Purge and The Cannister changed lord knows how many gas caps and still i get P0455 code.So i guess I'll check the purge to see if its opening or closing.

@Rik.B 7 лет назад

Awesome - been waiting for a new video!

@kmartin5054 Месяц назад

An excellent video to diagnose evap problems.

@davidnie2062 2 года назад

Thanks for going thru the steps to diagnose the problem. I have the same code reader and it helps me get thru the diagnosis. Curious if you could throw some advise out for a 2500hd with random misfires on cylinder3 and 4...dont know if you do things like this but I've pretty much have been done the rabbit hole with this thing and am running out of solutions....thanks and great videos

@bookofrevelation4924 2 года назад

Can we test for evap system failure without a tool to read computer by letting gas tank level drop below 1/4 tank to see if light goes off, then if light goes off from not testing evap system due to low fuel level, then fill above 3/4 to see if light stays off, and if off until fuel level drops below 3/4 before light turns on again, then the light is likely on from evap system? And purge valve most likely the problem as hardest working and moving part in the evap system? Gas cap for 15 dollars is tempting to try for a quick cheap fix, but not likely to get damaged before the moving purge valve wears out. Thanks for video, I learned allot.

@UQRXD 2 года назад

Yep that's why I am changing cap first.

@bookofrevelation4924 2 года назад

@@UQRXD before checking operation of the purge valve, which operates more than the other parts, and seems most likeky to fail before other parts in that system? I would pay the price of a gas cap to have the purge valve tested first. I had my mom fill up her Jeep Liberty to see if light goes off and it has not yet, she had it reset once and retightened gas cap, but light came back on. Might have her reset light while tank is full to see if it comes back on, and write down the code if she has someone read it again. She had someone read the code and tell her the computer said it was the gas cap, but she did not know there is a code and testing process rather than the computer simply saying directly it is the gas cap failing.

@UQRXD 2 года назад

I changed cap today. The code is not on right now since I reset yesterday. I will also fill the tank. The code was popping up right after start up according to the freeze frame data on my scanner. Cost so far 18.99 locking gas cap. Thank you for the reply. @@bookofrevelation4924

@d.d4184 4 года назад

Another Nice video. I LOVE the money light had one on today.

@movingupautodiagnostics8645 7 лет назад

Nice catch right there Eric, thanks for sharing.

@wyattoneable 7 лет назад

A noteworthy case study and once your on the right track, an easy fix. Thank you for that one. This may seem like a strange question to ask in public but is your lift capable of supporting an 8000 pound Dually? I have an idea.

@asice716 3 года назад

This video is insanely good. I have a nb Miata with P0455 code. Learn a lot about this code from you!

@ryanallen4346 7 лет назад

Dude, you are a beast. The guys at Belle Tire would think you're a god.

@shawnwithee3187 2 года назад

Again thanks for your time knowledge and professionalism awesome video

@billyjay4672 7 лет назад

very interesting Eric good job as usual.nice one

@owenpace31 6 лет назад

Wow great job Helps me out a ton keep up the good work

@Rose-ht4tq 6 лет назад

How do I find an honest mechanic like you???

@victorvillasana3409 4 года назад

Rose with a camera videoing the repair, 😂😀

@Paul1958R 7 лет назад

Great video as always! Obviously cannot diagnose this without a bi directional scan tool that the average guy wont have. What is the least expensive bi directional scan tool on the market? God Bless. Paul

@alexklaus8438 7 лет назад

Great job Eric!!!

@YH7R 2 года назад

hello, just ran across your content i can say you are very thorough......i just subscribed thanks for content

@larrykuzniar9381 5 лет назад

Great posts, very impressive technician

@FortyTwoAnswerToEverything 6 лет назад

Got the 455 on my 03 Envoy 5.3 at the moment. After a long drive, I can remove the fuel cap and venting like crazy.

@kas0016 5 лет назад

I think everyone hates evap issues. Even with knowledge and understanding.

@haywardsautomotive6156 7 лет назад

The ole tap test...if it doesn't work tap on it & if it doesn't work then hit it harder. :D Nice diagnosis & repair video as usual!

@sergiodjf 3 года назад

Great troubleshooting & explanation 👍💯

@JOSERGMMXX 3 года назад

thank you so much my friend great video . i replaced my purge valve for 3 time i just purchase autel tool same is yours so was able to run exact test you did, and find out purge valve go bad again 😕any idea why is keep going bad.

@FaithisKey792 4 года назад

Thank you amazing. God bless you all.

@EM-df6mo 4 года назад

Great information and explanation sir.

@brianstaples4057 Год назад

Great video as always Eric. My 2007 Chevy Impala at idle holds -100 pa and -350 pa running down the highway. Not sure if the solenoid is stuck closed or open. I have a scanner and vacuum gauge, this video should point me in the right direction. Thanks my friend.🚗🚦Let's see if I can do it to, yes?😉