A module in a vehicle used to monitor and control many components of the vehicle's engine management system. Code-DFNN,DJZX,DLAC,DMNP,DPNX. Part numbers are for remanufactured assemblies, Contact local dealer for possible core charge and exchange information. Stamped #12200411. ECC. Engine Control Computer. Engine Control Module (ECM). Engine Control Unit (ECU). General Purpose Embedded Control Unit. PCM. Powertrain Control Module. REMANUFACTURED MODULE.