Fault Codes/Power Solutions International, Inc./DTC1172Power Solutions International, Inc.DTC1172UnclassifiedLubricationWhat This Code MeansEPR pressure lower than expectedPossible Causes•Damaged, corroded, or contaminated EPR electrical connector C018•EPR failed fuel pressure test specifications•Faulty EPR (Electronic Pressure Regulator)Suggested Actions1Perform On-Board (OBD) System Check2Run the fuel pressure diagnostic test3Run the EPR pressure test and follow EPR service recommendations from the fuel pressure test chart4Inspect EPR electrical connector C018 and repair the circuit as necessary5Replace or repair the EPR6Clear DTC information from the ECM using the DSTRelated Power Solutions International, Inc. Fault CodesOTC 52 4DTC 2229DTC 524DTC 520DTC 236522341238129DTC 3032Browse all Power Solutions International, Inc. fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for DTC1172 on your specific Power Solutions International, Inc. unit — cited to the OEM manual, not a forum guess.TRY IT FREE