Engine Control Module or (ECM – ECU)
Engine Control Module or (ECM – ECU) is the brains of your vehicle. It monitors all the functions of your car, and if it notices something is off it will send a signal causing the check engine light to come on. The best way to make sure you are ordering the correct part is to check the original part number on your unit. The ECM, or ECU, controls numerous operations in your vehicle. The most common symptoms caused by a bad ECM are Injector issues, Ignition Idle, Air Control issues, no communication just to name a few. Your check engine Light won’t always come on when the ECM malfunctions.