A camshaft position sensor (CPS) is a device that monitors the position of the camshaft in an internal combustion engine, providing information to the engine’s electronic control unit (ECU). The ECU uses this information to control the timing of the engine’s valves, ensuring that they open and close at the correct time. If the CPS fails, the engine may not run properly or may even stall.
In most cases, a failed CPS will need to be replaced. However, if the CPS is simply dirty or misaligned, it may be possible to reset it without replacing it. Resetting the CPS will clear any fault codes that have been stored in the ECU and will allow the sensor to start working properly again.