2WD. 4.6. 5.4 Liter. federal. 49 State Emissions. 50 State Emissions. A module in a vehicle used to monitor and control many components of the vehicle's engine management system. Calif. Catch Code-VPH4. ECC. Engine Control Computer. Engine Control Module (ECM). Engine Control Unit (ECU). General Purpose Embedded Control Unit. MODULE - ENGINE CONTROL - EEC. PCM. Powertrain Control Module.