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On any OBDII system it means a medium leak in the evap system. It could be anything from a loose gas cap to a cracked hose on the charcoal canister...

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Q: What does the code P0442 on a jeep 2002 wrangler mean?
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Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)


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The 2002 Jeep Wrangler has 8 valves.


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The 2002 Jeep Wrangler has an inline 4 engine.


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The height of the 2002 Jeep Wrangler is 5 ft. 10.9 in. (70.9 in.).


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The 2002 Jeep Wrangler runs on regular unleaded.


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