Diagnostic Aids

WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The scan tool will indicate if a test has failed since the codes have been cleared. Misfire history will be stored and displayed for each of the cylinders at the time of the failure.
The CKP system variation learn procedure must be performed if any of the following conditions are true: The PCM has been replaced, DTC P1336 is set, engine has been replaced, crankshaft has been replaced, crankshaft balancer has been replaced or the CKP sensor has been replaced.
If the condition is intermittent, refer to INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.