Buick Excelle fault code p 1607 Control module ignition off timer performance

Engine control module (ECM)/ electronic throttle system control module-communication failure. Engine control module, also known as engine control unit (in some cars, engine control module and transmission control module are integrated to form powertrain control module), which controls the whole engine. Its main function is to control the optimal fuel injection quantity and ignition timing of the engine. Another important role is the component responsible for monitoring exhaust emission control. In the electronic throttle (ETC) system, the electronic control module (ECU) instructs the throttle position motor to optimize the throttle opening according to the signal from the accelerator pedal position (APP) sensor, engine speed, vehicle speed, air conditioning energy consumption, etc.