2nd design. 3.4 LITER. A module in a vehicle used to monitor and control many components of the vehicle's engine management system. Listing is for remanufactured part. Contact dealer for core exchange information. Part listed is for remanufactured part. Contact dealer for core exchange information. Part located on air cleaner housing. Listing is for remanufactured part. Stamped #12209614. ECC. Engine Control Computer. Engine Control Module (ECM). Engine Control Unit (ECU). General Purpose Embedded Control Unit. PCM. Powertrain Control Module.