The gas cap pictured above looks bad, the gasket is cracked and you would think it would be leaking, the odd thing is it seals up just fine.
DTC P0440 evaporative system leak detected. This is one of the OBD 2 codes that every car owner will hear about at least once. The code is for leakage in the evaporative system. It does not indicate the gas cap is bad, but a loose or defective gas cap can trigger the code. A faulty roll over valve on the top of the fuel tank can set the same code. The code will set in the computer for any number of reasons, that is why we run tests to rule out the unknown. The first test is the gas cap. It is a part that can wear out from use, so it is a good place to start.
It’s all good under the hood. Anthony Xavier ASE Master Technician
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Loved reading your blogs and reading the content. Great to see you today. Jeanne will be happy to know you are back.
Greg
Thank you Mr. Bez
My goal is to give clients an extra way to get answers to automotive questions.
Stop in anytime.
Thanks,
Anthony