Crank Case Position Sensor Test Procedures

A car's engine contains numerous sensors that report to the on-board computer. The signal of each sensor provides valuable performance information to the computer. One important sensor in a vehicle is the crank case position sensor; automotive technicians use test procedures to check the performance of this sensor.

Function

The crank case position, or CKP, sensor reports the positioning of the crankshaft to the vehicle's on-board computer. The crankshaft's accurate positioning is imperative for precise engine timing and ignition.

Features

Technicians visually verify a secure electrical harness connection to the sensor, as well as checking the sensor's O-ring, or gasket, placement. A technician may use a diagnostic device to detect and troubleshoot problems affecting a CKP sensor. If the diagnostic tool detects a problem, it will produce a report with error codes. Technicians use these error codes to troubleshoot and resolve all problems affecting the sensor.

Considerations

If the CKP sensor produces no signal, the engine will fail. However, if the vehicle uses a camshaft position sensor, in addition to the CKP sensor, the engine's computer will revert to the signal of the camshaft position sensor.

References

• Auto Zone: Crankshaft Position Sensor
• AA1 Car: Making Sense of Engine Sensors