What is the ECM on vehicles?
The ECM is short for Electronic Control Module and is a computer that is designed to monitor the component it belongs to. An engine ECM monitors emissions, fuel, air, speed, temperatures and has limits programed that keep horsepower and fueling in check mainly for emission purposes. It can also alert operator of any loop errors, Ie: check engine light elerts you when ECM detects loop error such as oil pressure low or catylst malfunction.
