Ignition/Distributor Engine Speed Input Circuit Range/Performance
Engine speed input from the ignition/distributor is in electrical range but plausibility check fails — slow response, drift, or noise.
Affected components
- Ignition distributor
Common causes
- High likelihood: Sensor drift or pickup gap wrong
- Low likelihood: Sensor element aged beyond calibration window
- Low likelihood: Sensor mounting loose - signal damping
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.