P0603 CHEVROLET – Control Module Long Term Memory Reset

P0603 CHEVROLET Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),Engine may not start

P0603 CHEVROLET Possible Causes

Loose or poor battery terminal connection,Low battery charge,Engine Control Module (ECM) / Powertrain Control Module (PCM) power supply circuit is open or shorted,ECM/PCM Programing,Faulty ECM/PCM

P0603 CHEVROLET Description

The Engine Control Module (ECM) / Powertrain Control Module (PCM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the will ECM/PCM will set the code and illuminate the engine light.