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Random P0455 gross evap leak/no flow code #4672743
02/21/18 08:11 AM
02/21/18 08:11 AM
Joined: Jan 2006
Posts: 1,116
Ohio
Dave Sherman Offline OP
Dave Sherman  Offline OP
Joined: Jan 2006
Posts: 1,116
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.


2015 Honda Pilot EX AWD Valvoline 0W-20 Bosch filter
1977 MG Midget Valvoline VR-1 20W-50 Bosch Filter
Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman] #4672753
02/21/18 08:34 AM
02/21/18 08:34 AM
Joined: Jun 2003
Posts: 17,342
Deplorable in apple valley, ca
Chris142 Online content
Chris142  Online Content
Joined: Jun 2003
Posts: 17,342
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.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman] #4672869
02/21/18 10:05 AM
02/21/18 10:05 AM
Joined: Jul 2012
Posts: 376
Michigan
khittner Offline
khittner  Offline
Joined: Jul 2012
Posts: 376
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.

Last edited by khittner; 02/21/18 10:07 AM.
Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman] #4672941
02/21/18 10:51 AM
02/21/18 10:51 AM
Joined: Dec 2003
Posts: 9,795
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,795
Florida, Cape Coral
+1 tank top up can be costly.


CX5 Touring 2.5L :-)
Re: Random P0455 gross evap leak/no flow code [Re: Dave Sherman] #4673165
02/21/18 01:02 PM
02/21/18 01:02 PM
Joined: Jan 2006
Posts: 1,116
Ohio
Dave Sherman Offline OP
Dave Sherman  Offline OP
Joined: Jan 2006
Posts: 1,116
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 Valvoline 0W-20 Bosch filter
1977 MG Midget Valvoline VR-1 20W-50 Bosch Filter

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