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This code indicates a 'small leak in evap system' . - Simplest and cheapest solution is usually fitting a new gas cap. If that doesn't do it look for a loose or broken small vacuum pipe in the engine bay. Also possible that evap canister is faulty.
As you don't give type and year of vehicle its very difficult to diagnose further.
What else can I help you with?
P0442 OBD-II Trouble Code?
Trouble code P0442 means: Evaporative emission control system, small leak detected
What does obd code p0442 mean on a 2001 Mustang Cobra?
Trouble code P0442 means: Evaporative Emission System Leak Detected (small leak)
What does the error code P0442 mean on a 2002 Nissan Altima?
This website has all of the OBD codes. http://autorepair.about.com/cs/troubleshooting/l/bl_obd_4.htm
What is a p0442 code 2002 mustang?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
Code p0442 on a Jeep Liberty?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
What is Volvo code p0442?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
P0442 error code 2003 Chevy venture?
Trouble code P0442 means: EVAP System Small Leak (0.040") Detected
Code p0442 on your Ford Focus 2001?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
What does p0442 code mean on dodge intrepid?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
Code p0442 on my Ford Expedition 2001?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
What does code p0442 on a Ford Expedition mean?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
What does it mean when you get code P0442 on a elandra 2000?
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
