Fault Codes/Power Solutions International, Inc./3031Power Solutions International, Inc.3031UnclassifiedGeneralWhat This Code MeansMIL ON during active fault; Closed Loop DisabledPossible Causes•Bad heater element in the UEGO sensor•Break in the wire harness on the heater supply or control circuits•Engine related problem•Fault within the ECM•Fuel system related problemSuggested Actions1Perform OBD system check2Verify the operation of the MILRelated Power Solutions International, Inc. Fault Codes303289012229890221358904211289102111891416748916Browse all Power Solutions International, Inc. fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 3031 on your specific Power Solutions International, Inc. unit — cited to the OEM manual, not a forum guess.TRY IT FREE