Engine Control Module (ECM) Replacement Cost. The average engine control module replacement cost is between $500 and $1000 on most car models. The ECM itself will cost about $450 to $900. That leaves ...

Engine Control Module replacement overview The engine control module, ECM, is one of the most important electrical components of the car, as we stated above. It continuously monitors numerous sensors, ...

A fix is now available for 2021 Cadillac CT5 sedans affected by an Engine Control Module (ECM) issue leading to non-reporting of catalytic converter faults.