Crankshaft Position Sensor: Description and Operation

Crankshaft Sensor

The current engine speed is transferred via the crankshaft position/rpm sensor to the engine control module. The crankshaft position/rpm sensor is designed as a Hall-effect sensor. An incremental wheel indicates the current crankshaft position. The crankshaft position/rpm sensor sends out a square-wave signal as the engine turns over.

Steps taken by engine control module in the event of a fault in the crankshaft position/rpm sensor.

If the crankshaft position/rpm sensor is faulty, a corresponding fault code "crankshaft position/rpm sensor" is stored in the fault code memory of the engine control module. The camshaft sensor signal is then used as the engine speed signal (emergency operation).

Possible effect: Misfiring is possible and start characteristics deteriorate.