Diagnostic Aids
WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
The CKP system variation compensating values are stored in PCM memory after a learn procedure has been performed. If the actual CKP variation is not within the CKP system variation compensating values stored in the PCM, DTC P0300 may set.
The CKP system variation learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P1336 is set:
- Engine replacement.
- PCM replacement.
- A harmonic balancer replacement.
- Crankshaft replacement.
- CKP sensor replacement.
- Any engine repairs which disturbs crankshaft/harmonic balancer to crankshaft position sensor relationship.
If the CKP system variation learn procedure cannot be performed successfully, check for the following conditions and correct as necessary:
- A damaged reluctor wheel.
- Excessive crankshaft runout.
- A damaged crankshaft.
- Interference in the signal circuit of the CKP sensor.
- A coolant temperature not within the Conditions For Running.
- The ignition switch is in the RUN position until the battery is drained.
- A PCM power disconnect with the ignition switch in RUN position may erase the stored value and set the DTC P1336.