Ignition/Distributor Engine Speed Input Circuit
A general electrical fault is reported on the engine speed input from the ignition/distributor — open, shorted, or out of plausibility. On older systems this is the distributor pickup; on newer ones it is the crank/cam-derived speed signal feeding the ignition driver.
Affected components
- Ignition distributor
- Crankshaft position sensor
Common causes
- High likelihood: Sensor or pickup failed
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.