Fault Codes/General Motors Powertrain/137General Motors Powertrain137UnclassifiedGeneralWhat This Code MeansMalfunction Indicator Lamp (MIL) illuminatedPossible Causes•Throttle Inlet Pressure (TIP) sensor voltage less than 0.2 voltsRelated General Motors Powertrain Fault Codes144211136224123225111242243314323332Browse all General Motors Powertrain fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 137 on your specific General Motors Powertrain unit — cited to the OEM manual, not a forum guess.Your question about 137GET THE ANSWERFree account required — we'll bring your question with you.