P0604 MERCEDES-BENZ – Internal Control Module Random Access Memory Error

P0604 MERCEDES-BENZ Possible Symptoms

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

P0604 MERCEDES-BENZ Possible Causes

Loose or poor battery terminal connection,Low battery charge,ECM power supply circuit is open or shorted,ECM Programing,Faulty ECM

P0604 MERCEDES-BENZ Description

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