Code po442 keeps popping up
SOURCE: Diagnostic trouble codes for 1990 pontiac bonneville LE
Here's one good place. www.engine-light-help.com
SOURCE: Pontiac Bonneville 2003 oil pressure 120/// and maf sensor code
Replace oil pressure sensor. What is the code?
SOURCE: how to clear code service engine soon 2002
you need to use an OBDII scan tool that will read any "error" codes and give you the system that will be causing the check engine light to come on. this tool will also allow you to erase the code after you have read it. write the code down as you may have to pinpoint exactly what part may have failed and needs replacing. something as simple as a loose gas cap will cause the check engine light to come on. it could be any of a dozen different emission or ignition sensors that may be bad depending on the error code. all 1996 and newer vehicles sold in the US will have the OBDII system and standard diagnostic/data link connector,which is usually under the driver side of the dash, to plug the scan tool into to read the DTC's(diagnostic trouble codes).
SOURCE: 2001 Pontiac Bonneville engine code: P0742 Torque
Well you have to take transmission's valve body cover off and locate the torque converter clutch solenoid and take it off and change it if necessary. because without that solenoid your transmission will not survive for long. Good luck
Trouble Code: P0442
EVAP System Small Leak (0.040") Detected
Possible Causes:
Charcoal canister is loaded with fuel or moisture .
Fuel filler cap is loose, cross-threaded, damaged or wrong part .
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking.
Fuel tank pressure sensor is damaged, disconnected or it failed.
Fuel tank vapor line(s) is clogged, damaged or disconnected.
Purge valve vapor line is clogged, damaged, or disconnected.
Purge solenoid or Vent solenoid has a small leaking (sticking.)
PCM has failed .
TSB 01-06-04-007A contains a repair procedure for this code.
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