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View Full Version : Evaporative emission control system leak detected code Po442 on 2002 chevy avalanche


rbrosseau
Feb 5, 2010, 07:04 PM
Code Po442 on 2002 chevy avalanche

TxGreaseMonkey
Feb 5, 2010, 07:28 PM
It could be a loose or defective gas cap, among other things. Be sure to also check all vacuum lines. Afterwards, use a code reader to clear the code.

CaptainRich
Feb 5, 2010, 07:40 PM
Have you ever replaced the sealing O-ring on the gas cap?
Do that: very inexpensive... Clear the code and drive off.
That check engine light will likely stay gone for a very long time.