P0455 Chevrolet -

Question

I have already changed the purge valve solenoid and the purge valve canister  and the gas cap,but the check engine light is still on and it continues to read the code P0455. What else can be the problem

Answer 1

Hi there,

I suggest a smoke test. This will locate the leak and then you can do the repair yourself to save some money. Since you have already basically replaced the most common causes, this should be the next step.