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Hello, I am Randall. I have reviewed your question and working on it now. Code 442 indicates a small evaporative leakIt is emissions code onlyThe fusle tank and vapor system are pressurized per say, then the computer can detect if a drop in that pressure should a leak developIt is a very difficult to track In the shop a smoke machine is used to inject a smoke into the system and look for smoke leaksIf no work has been done recently, no vacuum hoses or emission control items disturbed?The most common for the code is a bad gas capIn the shop that is the very first thing we replace for the codeA not sealing gas cap is the leading cause of the codeBelow is a list of possibles. I realize a long list thus the smoke test and full inspection