What does a Subaru ECM malfunction mean?

[VanJonathan]

ECM malfunction indicates an issue with the power module or the engine. The full name of Engine ECM is Engine Control Module. Generally, in the industry, it is commonly referred to as ECU - Electronic Control Unit. ECM working principle: It includes temperature sensors, pressure sensors, rotation sensors, flow sensors, position sensors, oxygen sensors, knock sensors, etc. These sensors collect information about the working status of various parts of the engine and send it to the ECU via transmission lines. After receiving these signals, the ECU analyzes them to determine the functional status and operational condition of the engine components. ECM working process: The program stored in the ROM memory is based on precisely calculated and extensively tested data MAPs. This inherent program continuously compares and calculates with the signals collected from various sensors while the engine is running. The results of these comparisons and calculations are used for closed-loop control of multiple engine parameters such as ignition, air-fuel ratio, idle speed, and exhaust gas recirculation.