Fault Codes/Power Solutions International/102 9Power Solutions International102 9UnclassifiedGeneralWhat This Code MeansMIL ON during active fault; Engine shutdownPossible Causes•MFG fluid downstream pressure sensor output voltage is lower than the internally-defined lower voltage limitSuggested Actions1Replace MFG with known good unit and retestRelated Power Solutions International Fault Codes102 C108102 0111:0101A117 489 2012121 2312215 74123Browse all Power Solutions International fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 102 9 on your specific Power Solutions International unit — cited to the OEM manual, not a forum guess.TRY IT FREE