3.7 LITER. code JKR6. code UVD1. JKR7. A module in a vehicle used to monitor and control many components of the vehicle's engine management system. Catch Code-JKR6. Catch Code-JKR7. Catch Code-JKR8. Catch Code-UVD1. 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.