Fault Codes/Power Solutions International/DTC 302 4Power Solutions InternationalDTC 302 4UnclassifiedGeneralWhat This Code MeansMIL: ON for active fault; Adaptive: DisabledPossible Causes•Poor harness connections•Faulty sensor•Internal fault message communicated to ECM over CANSuggested Actions1Check harness (post-control box harness, sensor side) for poor connections2Replace sensor with known good unit and re-test3Run the Closed-Loop test from the Tests page in EDISRelated Power Solutions International Fault CodesDTC 326DTC 327DTC 299DTC 336DTC 238DTC 342DTC 237DTC 355DTC 236DTC 522DTC 234DTC 563Browse all Power Solutions International fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for DTC 302 4 on your specific Power Solutions International unit — cited to the OEM manual, not a forum guess.TRY IT FREE