P0387 – Crankshaft Position Sensor ‘B’ Circuit Low Input

 

P0387: DIY Repairing Video Tutorial

https://youtu.be/MdVcaGcZfK0

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P0387 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Lack/Loss of Power,Engine Stall  

P0387 Possible Causes

  Faulty crankshaft position sensor,Crankshaft position sensor harness is open or shorted,Crankshaft position sensor circuit poor electrical connection,Signal plate may be damage,Starter motor may be faulty,Starting system circuit,Dead or weak battery  

P0387 Description

  The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the Electronic Control Module (ECM) to control ignition and fuel injection. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor. When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.