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#4672743 - 02/21/18 07:11 AM Random P0455 gross evap leak/no flow code
Dave Sherman Offline


Registered: 01/03/06
Posts: 1072
Loc: Ohio
The Traverse has started randomly throwing P0455 codes, usually after showing a tighten fuel cap message. Replaced the suspect aftermarket fuel cap with OEM, and it stayed quiet for a week. Now it's back. I'm thinking the purge valve is next, it's easy to get to. Any ideas? The fuel tank pressure sensor and canister vent solenoid are possible problems too, but involves dropping the gas tank to get to them.
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2015 Honda Pilot EX AWD
1977 MG Midget Valvoline VR-1 20W-50 Bosch Filter

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#4672753 - 02/21/18 07:34 AM Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman]
Chris142 Offline


Registered: 06/05/03
Posts: 16817
Loc: Deplorable in apple valley, ca
I can't help. I have been chasing that code on my wife's Tahoe forever. Replaced all the valves and such. Had it smoke tested etc. I gave up for now.
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#4672869 - 02/21/18 09:05 AM Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman]
khittner Offline


Registered: 07/13/12
Posts: 305
Loc: Michigan
I've very recently replaced canisters in two of my cars, as well as a vent valve and a vent line filter in my 2010 Hyundai Sonata. These aren't routine wear components, and are most typically damaged, thus generating codes, by overfilling/topping off the tank when fueling the vehicle. If you, like me, have usually tried to get the most out of whatever gasoline bargain that your phone app got you to by squeezing in a few more tenths of a gallon, you'll be money ahead by just stopping your refueling when the gas pump clicks off the first time. $600 later, and I'm getting smarter.


Edited by khittner (02/21/18 09:07 AM)

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#4672941 - 02/21/18 09:51 AM Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman]
Eddie Offline


Registered: 12/07/03
Posts: 9559
Loc: Florida, Cape Coral
+1 tank top up can be costly.
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#4673165 - 02/21/18 12:02 PM Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman]
Dave Sherman Offline


Registered: 01/03/06
Posts: 1072
Loc: Ohio
Thanks, but I don't top off the tank or leave the engine running while fueling. The suspect gas gap must have been installed by the previous owner, and sometimes it wouldn't "click" when I tightened it, which had me wondering. The OEM one was visibly different.
_________________________
2015 Honda Pilot EX AWD
1977 MG Midget Valvoline VR-1 20W-50 Bosch Filter

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