Crankshaft Position Sensor A Circuit Intermittent
The crankshaft position sensor A signal jumps or drops out intermittently — connector, sensor air gap, or damaged tone wheel. The PCM may detect a "false" stall or misfire spike when the signal drops.
Affected components
- Crankshaft position sensor
- Flywheel
Common causes
- High likelihood: Intermittent connector
- Medium likelihood: Tone wheel chipped or contaminated
- Low likelihood: Connector with intermittent contact under vibration
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
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.