Diagnostic Aids
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. 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 value stored in the PCM memory, 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 P0315 is set.
- An engine replacement.
- A PCM replacement.
- A harmonic balancer replacement.
- Any engine repairs which disturb the CKP sensor relationship.
- Worn crankshaft main bearings.
- A damaged reluctor wheel.
- Excessive crankshaft runout.
- A damaged crankshaft.
- Interference in the signal circuit of the CKP sensor.
- A coolant temperature that is not within the Conditions for Running the DTC.
- The ignition switch is in the ON position until the battery has sufficient voltage.
- A PCM power disconnect with the ignition ON may erase the stored value and set DTC P0315.
- Any foreign material passing between the CKP sensor and the reluctor wheel.