How to Fix Evap Codes P0455, P0456 & P0457

How to Diagnose Evap Codes P0455, P0456 and P0457

[@qssneaky]

After trying everything from gas cap, smoke test, new hoses and a new fuel pump seal for 4 years and still having the engine light come on with the P0455 code, I finally pulled the cluster panel and pulled out the engine light bulb and smashed it. After 4 years of dealing with this stupid code, I finally said enough was enough. Jeep still runs great.

[@BigEightiesNewWave]

😂

[@tyishacustalow2176]

Buff Barnaby g

[@MrTonyVision]

In Calif, we are forced to pass smog checks very two years for 'clean air'. Check engine light and any 'leaks' will FAIL your car and then you can't get registered for the next 2 years.

[@charger19691]

qssneaky, I feel your pain. Rock on brother!

[@frankierosato1129]

I was just thinking that an emission leak really isn't going to hurt anything anyway with functioning of engine and driving? I wouldn't sweat it too much. I have a bimmer and got the same code as you. I think it's the canister purge valve but I could play part games all day. Buy this but that, fix this fix that and not know. Gas cap I doubt it. How does a new gas cap fix it 80 to 90% of the time? If I'm wrong, and those stats are right forgive me now.

[@normvanwinkle7670]

Great, Concise yet thorough checklist and explanation of most likely items! Not Too wordy, Not too brief! and appreciate you putting them in a bit of sequence of Most likely possibilities! Thanks a million!

[@LM-nc5ni]

Thanks for emphasizing using an OEM gas cap. Your statement that 80% of these codes can be eliminated (by the right gas cap) made me purchase a $24 gas cap at the Chrysler dealer and to toss out my $12 aftermarket one purchased at Autozone. Comparing the OEM and aftermarket side by side you can see the OEM is designed to seal much better. You saved me a lot of stress and money days before my daughters wedding!

[@Erick-zy7ul]

Now That's how you do a you tube video. Great, professional and to the point which most of us like. Congratulations on a great, helpful video.

[@markgeorge2981]

Great video young man. I'm an old car guy from way back and the newer vehicles are not always to diagnose the problem. Thanks again.

[@101ahmere]

This video legit just solved my problem. Check engine light gone. Thanks man

[@colinanorte302]

Excellent video. Thanks for the pictures showing the parts, the steps to solve problems, and the estimate on repair cost. very useful.

[@benchen40020]

Ramo Zeraus bb@!- NnNnnnnn’nnn

[@squirrley9]

Changing the gas cap worked for me. Thanks!! Reset the computer and away I go!!

[@charcar03]

Thank you! To the point and very informative. Finally a channel to subscribe to so I don’t have to sift through all the random (hardly helpful) videos out there. Well done!

[@glennthompson6868]

Thanks for taking the time to put this video together. It was very clear and helpful!

[@diame9595]

thanks for the information. I've been reluctant about paying $500 to the dealer to fix evap canister and hose on my 2004 Navigator. I just may purchase the parts from Autozone and have a mechanic put them on.

[@wdelainemorgan]

Thanks for sharing this video. We just bought our daughter a 2009 Hyuandia Accent. We believe the purge valve needs to be replaced as this is a common problem po456 code came up when tested. Thanks for your clear precise explanation. Also, the following codes came up 300 303 and 304. They are all misfire engine codes. The guys at the parts store told her that it may be a spark plug, or wiring. This was in cylinder 3 and 4. Thanks again.

[@TubeBrowser2012]

I took your advice to buy the factory gas cap at $26.00 for Dodge Ram1500 and the light has gone away after I drove for two days. The Christian Brothers quoted $513.00 for replacing the Leak Detection Pump after a diagnostic test resulted with the P0455 code. You can tell how much I appreciate your video which is well intended. Thank you.

[@richevans1694]

In my 2011 Jeep Wrangler Unlimited, I am getting a P0457 code after a check engine light and gas cap indicator light is on. I bought the new factory gas cap, but it didn't clear the check engine light nor the gas cap light. I tried clear the code, and then it just came back on after 30 miles. I went to the dealer, who did a smoke test, but couldn't find anything from it. They wanted to then pull the gas tank off to look at the line from the gas cap to the tank, as well as the connectors/seals there. This would have cost 450, so I put the brakes on them doing it, as the smoke test didn't reveal any leaks. So, I took a more trusted friend, who is going to do the smoke test again. I actually think it has to do with the vent valve sticking open or the cannister purging valve. Everything else runs pretty smooth on it. We update everyone when I know more.

[@EssenceofStrings]

Be careful. Sometimes when you replace a part and that was not the problem it takes a long time for the code to come back especially when its a small leak at the fuel pump , until it's worse. That is actually the most common cause 2007-2009 Sonatas. When my mechanic replaced mine he insisted on using OEM because he had too many comebacks on aftermarkets with altered design.

[@lovieb9028]

Wow, this is first time I got the information I'm looking for, you did not beat the bush (around and about) to give information that will help Thanks you for taking time to explain what the code mean,

[@ffffest]

This is a great video! I just returned the after-market cap and put the original one back. The check engine is gone! So I endorse only to buy genuine cap if you are interested to permanently fix the problem.

[@artshahnazarianesq.6774]

Thanks for the video. I have a 2013 Dodge Durango. Rather than replace the gas cap, I cleaned it with the proper cleaner. And, I reset the check engine light by disconnecting the negative on the battery. I used Blaster from Autozone. Cleaner must have petroleum-based lube. So far, so good! No check engine light yet!

[@bencuraza5045]

GREAT STEP BY STEP EXPLANATION. Myself NOT mechanical this year going the route for DYI. THX

[@raymondboone9717]

Mine was the gas cap ! Bought after market, didn't work on my Altima. Bought from dealership $28 Worked.

[@ABN6565]

I did that with my mom's Old 2012 Acura. Nightmare finding the radio security codes. Good post, thank you. And when you do change the gas cap it takes at least 24 to 48 hours to clear. And what I've found it will clear, just a little patience. After 3 days and isn't clear. Continue troubleshooting.

[@jimposten]

Great video! I really appreciate the simple yet thorough explanation, as well as the pics throughout giving a visual to the part or tool being mentioned. Videos like this are what's great about KZbin. P.s. it was my gas cap. (07 Chrysler town and country)

[@SarahLynnLee]

My issue was the fuel cap. Thank you for the great video, it really helped me!!

[@kjclaytor]

Thank you for sharing your expertise!! The information you provided was very clear. Keep up the good work.

[@AndersonKaryn]

Dude thank you! between my honest mechanic and you... i'm happy!

[@emilaznar526]

My Chrysler 300 has 60K miles, all the rubber hoses look good from first inspection so even though I read Bob No in the previous comment I think I'll try the gas cap since it's cheap and something I can go myself. If not, then off to the mechanic. Thanks. Good video, easy to understand.

[@JohnWick-bs1dg]

Emil Aznar hey friend i have the same car bt 2012year i was woundering if u ever figuer out the problem? If you can pls let me knw i will be greatful

[@emilaznar526]

I asked a mechanic friend of mine and he said first clear the code and see what happens in the next couple of weeks. I did and the light on the dash is still off.

[@trickeydicky]

i own a repair shop and indeed %75 are gas cap related

[@jonathanlopes7009]

thanks great video, perfect way to show n explain how to fix the problem... thanks again

[@ismailghanayem7549]

Love the explanation . Very easy and reasonable . Thanks a lot

[@FOFIDDYR]

Thanks. This cleared the fog of "what is wrong?"

[@redcloud5813]

Thanks for making the video short and to the point.

[@mikechiodetti4482]

I've had vapor hoses, the fuel tank pressure sensor, a plugged filter which is in front of the Canister Vent Valve cause Evap codes on various vehicles. Then it got more interesting with a small leak from the seal thats between the fuel tank and the fuel pump module. Many of these problems were located using the "smoke machine " which can be used to locate leaks from air exiting the vehicle with the windows up, doors and vents closed. If your vehicle's Heating, Ventilation and Air Conditioning, or H.V.A.C. system is vacuum operated and has a leak like a hissing sound, the Smoke Machine can help find the leak. My worse Evap problem was a Powertrain Control Module or P.C.M. the would INTERMITTENTLY not turn on the purge or V.M.V. valve, which would not allow the gas fumes to be purged from the fuel tank. THAT ONE WAS A FUN ONE ! ! !

[@007conspiracytheory]

Mike Chiodetti how'd you fix that big evap nightmare of yours ???

[@mikechiodetti4482]

007conspiracytheory WOW! That was over a year ago, but the memory of that one is fresh like it was yesterday! While watching the Ford IDS on our laptop, it was showing the P.W.Modulation happening with current being consumed, BUT, no vapor flow! I put my digital multimeter on the PCM pin that grounds the purge flow solenoid coil. with the engine running, I manually (through the IDS) turned on the purge valve, the DMM changed from 14.3 Volts to about .1 volt or less. We have vapor flow. Turned the purge valve off, DMM returns to charging system voltage and no flow. paused a few seconds. Turned on again. DMM changes normally, we have flow. Turned off, no flow, DMM back to charging voltage. Paused. Third time, same thing. Paused. Fourth time, DMM shows PCM trying to ground the purge valve coil, but cannot, voltage returns to charging voltage. Paused. Tried again. This time the third time was the charm! Turned off engine, waited about 1/2 hour, tried again. Third try was the charm! Installed a Reman Ford ECM, retested, all well in Ford Land! I learned that multiple tries trick several years ago with a different vehicle and a different electrical problem. HTH. Mike

[@fraddaal333]

Excellent video. I replaced the gas cap. Waiting to see if the light comes back up.

[@alm7707]

I agree with Bob No. Most times these codes come on because of the vent valve are faulty or not sealing because of dirt inside. You can usually remove them and take them apart and clean them with compressed air. Most of the cars I work on drive several hundred or more miles a year on gravel roads. Sometimes the vapor canister or lines are cracked due to flying stones. ( windshield repair companies make a killing here!) If you don't drive gravel....maybe check your gas cap.

[@Charlynehehe]

This video totally saved me some stress, good looking out bro 🤝🤛

[@caribbeanqueen5589]

Great info my friend keep up the good work. Happy Holidays

[@johnwadsworth7086]

Great info thx......my wife bought a after market gas cap I'll go to ford and get a real one pull the battery cables and see if that does it if not then a evap test.....sounds like I know what I'm talking about

[@wb5rue]

Love the Lava Lamp decor! Nice video, good help. Thanks.

[@MikeMikeLowrey]

great video. informative and to the point. good pictures showing what parts are great addition as well.

[@downtownautoplaza8564]

AWESOME VIDEO, WORKED FOR US. FOR OTHER PEOPLE WITH BAD COMMENTS, THEY ARE JUST IGNORANT.

[@big-patria-lo3508]

Great vid I will definitely try sone of these things you listed I had a P0455,And a P0456 pop up on my 2011 Jeep Patriot

[@pmaradiaga9073]

What ended up being the issue?

[@johngray30]

Original owner of Dodge Durango here.... 280K mi... All emissions trouble codes were resolved by replacing various section of vacuum lines or just fixing splits with gasket Silone sealer and rapping with electric vinyl tape from auto parts store.... Only replaced gas cap once because I didn't realized I was lied to by the dealership.

[@akhandmahmoodashek3506]

Very helpful... Thanks a lot... Really appreciate you effort.....

[@archielovatojr3353]

Thank you, sir...on myway to buy a FACTORY gas cap.

[@Uncle--Fatty]

VOLVO P0455 = gas cap... As far as Auto Zone goes... ya get a print out, their Innova machines do NOT reset... anything... GREAT VID..!!

[@ange714gu]

Great video, dodge man over here 😁🤙

[@adamjoseph1970]

Great video. Quick question: I have an cel code p0456 on my 2013 Corolla S. Had a smoke test done and smoke was coming out of the gas cap. Replaced the old cap TWICE, both OEM models, and I still get smoke coming from the gas cap along with the p0456 code. I checked the filler neck, fuel lip, gas tank, etc. Shows no signs of corrosion whatsoever. I need to pass emissions, help!

[@ronaldcrawford7696]

Excellent video. Helps a lot. Thanks

[@paleo704]

Outstanding video. Very easily stated for a novice like me

[@NoCapAllowedPodcast]

this video was extremely helpful. I am very thankful you shared your knowledge about these codes!

[@donnalynn286]

Question if i replace gas cap and have the check engine light reset. I was told here in arizona that the inspection center can tell the engine light was reset and you will fail inspection. Do you know if that is correct? Because if i buy the gas cap and can't reset the engine light it won't pass inspection any way so I am just confused. Thank you

[@delta9thcfan]

Technically smoke is last , pressurized nitrogen with data list monitoring is preferred along with "snoop" or soapy water on all connections . The other problem is that restrictions register as leaks on older software and cars so smoking is less than ideal.

[@deniselaurin6740]

It can also be caused by something as simple as running into the E mark on your gas gauge, i.e. not getting gas until you're running on fumes. If you've done this, the check engine light will come on a day or two later and you'll find this code. Another couple of days, and the check engine light will go out on its own.

[@gerardoguzman4709]

thanks

[@starkey0417]

Glad I stumbled across this. Great help!

[@ghayas1698]

Excellent Video and best Advise

[@evilagelist3089]

You can actually cause problems by unhooking your battery to clear the code. In some vehicles resetting the code by unhooking the battery can cause the computer to store the code even further within itself. You're better off taking a 25 minute trip once or twice. It will reset itself if the issue is resolved. This is fine as a small leak evap cope won't hurt anything.

[@chriswinchester4805]

Great stuff, man! Thanks for the lesson.

[@Sagina1999]

Great video man!

[@philwhipple4557]

You're right about Dodge's.

[@trulysick86]

Smoke machines will not help with very small or small leaks. Large leaks are typically a cap.

[@FakeItalianoII]

Thanks for the excellent information !!!

[@TheVegasViolator]

Very helpful, thanks man.

[@perronwiley6523]

Great video, well done...

[@anthonypeoples9018]

Thank bro very informative video that’s short and sweet!!!!!

[@LuciousWeatherby]

Good video bro I have a 2005 Santa Fe and my mechanic told me to get new gas cap and I just bought one from Auto zone and he reset the codes and about 2days later the check engine light came back on. And you said a person should replace the gas with the original factory gas cap. Should I try that before I go get a smoke test?

[@georgepapaioannou5115]

Great video, very useful and even entertaining.

[@maldoror23]

Video is very helpful, Thank you SO much!!!

[@ivanfletcher4671]

thanks man, really appreciate you posting this up.

[@magic591]

Excellent job with the video, thank you.

[@Kennyy212]

Thanks man, gas cap fixed my 07 Grand Cherokee

[@faith1650]

Great video! Thanks for all your information it really help

[@wootuser]

OK just went through a P0455 on a 2015 Kia soul for second time. Found out my new Amazon OEM gas cap was not seating right and daughter was not tightening it all the way. It is tight going into the fuel tank hole (zero tolerance) and then I can turn it and make it click with it not being set in all the way. The trick with mine is I have to make sure it is aligned on the threading then push down (It's a little fight to set it right) and it will go down about 3/4 of an inch then I can tighten it and my cap clicks. Reset error code and didn't come back. Had a training session on twisting that specific gas cap. It just needs to be broken in.

[@zionismisamentaldisorder658]

removing the negative battery cable clears the light - But - won't pass inspection because the 3 or 4 Evap codes on the inspection will be blank meaning the test is a FAIL until those codes are back online - which requires driving for about 100-150 miles. Then the light might come back on or the code could actually be cleared which is unlikely.

[@ronaldturner8319]

hey thank for being there helped me very me very much."Thanks"

[@kyleclouse]

Thanks for the video! This is exactly what I was needing as I just through P0457.

[@crystalstanford1840]

I have a 2006 odyssey that has come up with this code...moments after it came up, the van began sputtering went into safety driving mode and is bellowing smoke out of the tail pipe. My brother is handy with parts replacing, but not so much with diagnosing. Any tips to help him narrow it down? Thank you for your videos.

[@Lasrsjesperlarsson]

Thanks! It fix my problem without cost!

[@acbent11]

NVLD Pump? I just bought a Dorman 310-500 for my '06 Dodge Grand Caravan. Hoping it fixes my P0440, P0456, P0457 codes. Already replaced the gas cap with a Mopar. I know this is a crap shoot. If this fails, I'll have the smoke test done. Local Chrysler/Dodge dealer is about $79.00. Also, learned a long time ago about not topping up your tank. I stopped doing that about the time the MIL showed up.

[@timl9495]

Good video! Do you have other videos for P0420 and P0430 ?

[@recycledcitizen]

2012 Mazda 3 Skyactiv engine. Replaced gas cap with OEM part from dealer. Code reset by mechanic. Good for 3 weeks and the light came back. Thoughts?

[@pmaradiaga9073]

Great vid my man. Quick question. If my check engine light is off, but I'm still getting the P0456 code, could that still be the gas cap? The mechanic told me it was the canister, I'm not trying to get ripped off. I already paid $100 for diagnostic.

[@bigfatcody]

The radio code for Hondas can be found on the side of the glove box open it up and look on the outside of it.

[@THEVOICEOFTHECHOSENONETV]

Thank you bro! My car engine light came on after my cap was showing CHECK! I will go ahead and do the first step by replacing the gas CAP

[@patrickrobinson317]

Great explanation. Thanks.

[@krugtech]

would a swollen check valve inside the tank cause this? it seems my 2006 300C had the warrenty upgraded to lifetime because of this valve being messed up and filling the gas tank causes the car to stall.

[@cjmo81]

Ok for the Ford Focus 2012 model they don't have a gas cap the mechanism inside of it will move will by a magnet when you put the gas nozzle inside. So would I have to take my battery out

[@patriciabaker9699]

Excellent video thank you for the info... 5 out of 5 stars.

[@2thePtBassTuT]

I replaced the cap because of a PO456 ... the light stayed off for 5 days and then came back on. It has done this 2x now. I will try an OEM cap next --maybe the aftermarket caps are missing a slight design difference that the OEM one has...

[@BigEightiesNewWave]

I blew vape cloud into hoses...saved me. No smoke machine needed.

[@ijg8343]

Lmao..you dead serious too

[@raton702]

So you strongly recommended a original gas cap ? Or I should wait the three days and see if the light don't come back ? I'd get those two codes with orreillys and the guy reset the codes Thanks for the good info

[@kplessl3]

Thanks for the information.

[@mb1636]

Good info ..i have p0455 frontier 07. Question? Is it bad to drive vehicle with this code n for how long? My budget is really low right now. Thnx again ?

[@toddmyers6503]

you are the man thanks for this video!

[@kurash2]

Hi: Thank you so much for making this video. I scaned mine (CIVIC 2003), it says P1457 EVAP control system leakage (EVAP Canister system). I disconnected my battery, and it worked for one week and is on this morning. I am planning to buy a new gas tank cap tonight. Is there anything you would suggest/share? Thanks again.

[@SangDaNoble517]

Solved my problem immediately, Thank you Bro!

[@marybritton8982]

Where is the vent valve located? Does the engine have to be dropped for this?

[@KnightRider1983]

P0455 recently came on on my wifes 2010 Ford Fusion. It has no gas cap.

[@davidr2715]

I checked the MOPAR website and found the fuel filler cap (52030377AB) for $126. I’ll just stick with OBD resets. Where would one find a new genuine $24 Dodge Ram filler cap, not after-market?

[@TheCodesterr]

My trailblazer threw a "loose gas cap" light so I unscrewed it and screwed it back on. Same day it went off and now I have check engine light. You think it's the gas cap?

[@candylace510]

Thank you that was super helpful!