Crankshaft Position Sensor "A" Circuit Range/Performance
The CKP signal is present but inconsistent with engine RPM, or pulse counts deviate from the reluctor's expected pattern. Often points to a damaged tooth on the reluctor or an air gap that has changed.
Affected components
- Crankshaft position sensor
- Reluctor ring
Common causes
- Medium likelihood: Reluctor tooth damaged
- Medium likelihood: Sensor air gap incorrect
- High likelihood: Sensor intermittent (often heat-related)
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.