P0503 BUICK – Vehicle Speed Sensor Circuit Intermittent

 

P0503: DIY Repairing Video Tutorial

https://youtu.be/Cxuf3kpjXBM

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

 

P0503 BUICK Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Speedometer may not work properly,Transmission shifting problem  

P0503 BUICK Possible Causes

  Faulty Vehicle Speed Sensor,Vehicle speed sensor harness or connectors is open or shorted,Vehicle speed sensor circuit poor electrical connection,Faulty Powertrain Control Module (PCM)  

P0503 BUICK Description

  The Vehicle Speed Sensor (VSS) assembly provides vehicle speed information to the Powertrain Control Module (PCM). The VSS assembly is a Permanent Magnet (PM) generator. The PM generator produces a pulsing AC voltage as rotor teeth on the transmission output shaft pass through the sensor’s magnetic field. The AC voltage level and the number of pulses increase as the speed of the vehicle increases. The PCM converts the pulsing voltage to vehicle speed. The PCM uses the vehicle speed signal to determine shift timing and torque converter clutch (TCC) scheduling.