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Discussion Starter #1 (Edited)
I have a 2008 redline,
I believe the P0455 code is evap system leak detected and the P0497 is evap low purge flow.

I tested the purge solenoid under the hood, it was failed open. I replaced with a new one and reset my codes. They popped up again and now I have replaced my gas cap and the evap vent canister (may not be the right name) which was located in the trunk in the gas tank compartment.

I'm really stumped now, cause I'm still getting these codes. I believe these 3 things I have replaced are what I have found recommended on this forum and other sources with these codes.

My cars symptoms are a rough idle, and rarely a hard start. This does not get worse after filling up. I dont notice a gassy smell often at all, only when the car sits for an extended period of time (happened once when I came back from out of town).

Any recommendations from anyone would be greatly appreciated. Thank you!
 

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There have been reports of cracked hoses, especially at the ends, and you could also have a bad connection due to a stiffened hose.

Is the EVAP Vent Solenoid part of the EVAP Canister? If it is stuck open or leaking it looks like you could get these codes.

You could also have an electrical fault that is keeping one or the other of the valves from functioning, and you could have a problem with the fuel tank pressure sensor.
Electrical problems shouldn't cause any running problems, so you can probably rule them out.
 

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Discussion Starter #3
There have been reports of cracked hoses, especially at the ends, and you could also have a bad connection due to a stiffened hose.

Is the EVAP Vent Solenoid part of the EVAP Canister? If it is stuck open or leaking it looks like you could get these codes.

You could also have an electrical fault that is keeping one or the other of the valves from functioning, and you could have a problem with the fuel tank pressure sensor.
Electrical problems shouldn't cause any running problems, so you can probably rule them out.
The hoses are the next thing on my list then.

I've been trying to find out if the solenoid is part of the canister, and every part I'm seeing is coming up as the part I replaced. That leads me to believe that they are one of the same. Though I'll have to dig some more.

Those last two are possible causes I have not thought of. I'll begin looking into those also.

Thank you for your help, these may help lead me to finding the problem.

I'll post an update if I find anything out.
 
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