P0455 Help Please

I've read over the other threads with this SES Code (P0455) info really wasn't that helpful, so I found the engine and emission control service manuals to try and read over. Just thought with everyones knowledge maybe someone could steer me in the right direction, (the engine is the 3.0)...

1. Poor starting or no starting, mainly with damp conditions or when it is/has rained.

2. I did try replacing the fuel cap, with no luck

3. The SES light would come and go by itself (same code). The Zone turned it off a few times, with the idea the fuel cap was the problem.

The light now remains on, with the starting issue getting worse.

Hopefully someone can help, Thanks!!

there might be a leak anywhere in the evap system.

see if it builds pressure in the tank after some time. if not you should inspect the line that comes from the tank and goes to the evap canister. after it goes to the canister, it goes thru a solenoid to the intake manifold. the evap line is usually made of metal and comes out somewhere around the firewall. check a manual for component locations.

do you smell raw fuel? the fuel supply and return lines can cause depressurized tank if air is introduced to the system. check for rust spots on the two lines.

if you have haynes manual, the page is 6-23. the evap solenoid is located on the left side of the intake manifold. its the first solenoid that you see on top, it should have two hose lines going to it. the evap canister according to the manual is behind the fuel tank. page 6-22

+1.Let your nose do the detective work.If your throwing a big evap leak code,you should be able to narrow it down by sniffing your way around the suspect components.

Good Info...hopefully I'll get a chance to read over the manual and sniff around this weekend

might be something as dumb as a rotting fill pipe or vent pipe. If it looks bad, you may want to replace it anyway.

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Originally Posted by mitsu_vic

I've read over the other threads with this SES Code (P0455) info really wasn't that helpful, so I found the engine and emission control service manuals to try and read over. Just thought with everyones knowledge maybe someone could steer me in the right direction, (the engine is the 3.0)...

1. Poor starting or no starting, mainly with damp conditions or when it is/has rained.

2. I did try replacing the fuel cap, with no luck

3. The SES light would come and go by itself (same code). The Zone turned it off a few times, with the idea the fuel cap was the problem.

The light now remains on, with the starting issue getting worse.

Hopefully someone can help, Thanks!!

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I had a problem with this and sometimes i would get pressure built up in my tank, when i opened it, it released the pressure. I haven't had it in a long time, and i think its because i don't use any of that 10% ethanol mix gas, i use straight gas, and haven't had any problems yet... BTW the purge soleniod, which would be the most likely item to go bad, is like $250 bucks lol, and i have no idea where its at, either did my stealership lol

just got this code a couple of days ago disconnected the battery and it went away for about 50 miles then came back on. The tank is almost empty i suspect that to be the problem dont have money to fill it up until tomorrow. if that doesn't work what should i try
ive already checked fuel lines they are A-OKEY

^ You don't get CEL's for being low on gas...

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Originally Posted by oakrdrs187

^ You don't get CEL's for being low on gas...

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true, it is the case of the evap system is faulty because of low gas and because ive bin runing on low gas for a while.
that is my guess
this workd on another cel light that had to do with the evap system

as the guys say, more likely you have a pin hole leak somewhere