Fault Codes/Power Solutions International/117 4Power Solutions International117 4UnclassifiedGeneralWhat This Code MeansMIL illuminated (ON during active fault); Engine power derate 1; Adaptive Disabled; Engine shut downPossible Causes•Voltage supply to EPR/CFV exceeds 33.0 VDC for greater than 3 seconds while engine is running•ECM loses CAN communication with the EPR•Power loss at the EPR•Improper CAN termination•Improper CAN wiringRelated Power Solutions International Fault Codes121122111:0123108161 4102 C222102 9223102 0302 4Browse all Power Solutions International fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 117 4 on your specific Power Solutions International unit — cited to the OEM manual, not a forum guess.TRY IT FREE