I have a 04 chevy cavalier and check engine light code is 0442 which is evap purge conrol valve. Where is that located?
It looks like it may run you about $30. Easy to install.
You may also want to check your gas cap for a tight fit. This is a generic code for a leak detected in the EVAP system. Could be anywhere: http://www.obd-codes.com/p0442
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