An ECM, or engine control module, can be a computer that controls the engine. A PCM, or powertrain control module, is a computer that controls the transmission and engine in an effort to enhance gasoline economic system and energy. This Site provides only the solution with effectively-indicated codes and specifications. https://beckettjylzn.affiliatblogger.com/78812085/not-known-facts-about-cummins-ecm-rebuilders