check engine DTC PO455
Elder User
Joined: Sep 2000
Posts: 580
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From: Kelseyville, CA
check engine DTC PO455
The P0455 was "just my gas cap" last year. Id didn't matter how tight it was and it looked to be in good shape, but the light would not stay out until I replaced my cap with a new one from Checker's for $7. My P0455 showed up two weeks after the local emissions place checked my emissions and did a preasure check on my gas cap. It passed the test, but for some reason it quit sealing two weeks later. In any event, a new gas cap is the cheapest thing to try (besides looking around your fuel lines to and from the tank for a leak).
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