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== == Evaporative Emission Control System Leak Detected (small leak) Many places will tell you to tighten the fuel cap as a first step. Have code cleared and see if that solves the problem. O-ring on Gas cap could also be dry rotted.

Most likely one of the hoses of the EVAP system has cracked or developed a leak. Trace the lines of the evap system using the under hood diagram looking for loose, cracked hoses and broken fittings. In my case the large hose coming from the canister ( by the fuel tank ) had split at the end and the system could not build up enough vacuum pressure.

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Q: Where do you start to find the problem for a OBDII code 0442?
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