Tighten Fuel Cap Dic Message With A Po442

[sledr]

Starting last winter I would get the "Tighten Fuel Cap" DIC message. The cap always seemed tight but the SES light would always follow this message. I have read on here that 442 is the gas cap code so I have cleaned the gas cap and filler neck area. But 442 can be caused by other problems as well. If you get a "Tighten Fuel Cap" DIC message with a 442 code does this mean the problem is in the gas cap? My next step is to swap in a new gas cap but I don't want to start throwing parts until I am sure of the problem.

[azgooch]

I have gotten the same message a couple of times since I installed a locking gas cap and an Airaid air filter. As you, I don't want to start throwing away parts until I know for sure.

[atboley]

those locking caps are peices of junk, they always leak, if you have one, replace that b4 you do anything else... but most likely even if you dont have a locking cap, even the factory ones leak all the time, start by replacing the cap, if it still has a problem the dealer will smoke test it and see exactly were the leak is commming from...

[atboley]

just to clarify, yes that message could be set by lots of things, not just a gas cap, a leaking filler neck, the fuel pump seal leaking, a line come off the charcoal canister, or a pinhole in any of the lines from the tank to the canistor to the purge valve in the engine compartment...