Car Crankshaft Position Sensors

What Are the Symptoms of a Bad CKP sensors?

In case of the crankshaft position sensor is damaged, the ECU cannot receive the reference signal when starting, and the ignition coil will not generate high voltage. If the engine is not started 2S after the ignition switch is turned on, the ECU will cut off the control voltage to the fuel pump relay and stop the power supply to the fuel pump and ignition coil, resulting in the failure of starting the vehicle. If the following symptoms occur, the CKP sensor may have failed.

• There is No Idle Speed

There is no idle speed, or the engine trembles seriously at idle speed, the exhaust pipe makes a blasting sound during refueling, which is occasionally accompanied by a blasting sound, and the refueling is dead.

• The Deviation is Serious and Cannot Be Started

The deviation is serious and cannot be started. Some models will hear the impact sound in the engine when the motor is turned on, which is the sound of the piston hitting the valve. This will not happen in advanced vehicles.

• The Vehicle Starting Time Becomes Longer

The vehicle starting time becomes longer. The engine depends on the CKP sensors to continue to work, but the starting time may be relatively long, and the automotive constant speed cruise cannot work normally. There will also be engine shaking, white smoke and other phenomena.