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the engine light came on and took it to Pep Boys who did a diagnostic reading and the code retrieved was 442...they told me they dont have the equipment to check the system for this code and they reset it so the light is no longer on....they said if the light does not come on not to worry about it...if the light comes on to take it to a smoke detection place...is this right?....nothing to do until light comes on? im in california...thank you. I have a 2002 Jeep Liberty

Vehicle: 2002

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This is correct. The 442 code is a leak in the evap system. Something as simple as a loose fuel cap can cause this code and then if it is cleared and the cap is on tight the light won't return.If it does return then it indicates something else in the evap system is leaking and a smoke test is the best method for finding the leak.

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