Fault Codes/General Motors Powertrain/ECT VOLTAGE HIGHGeneral Motors PowertrainECT VOLTAGE HIGHUnclassifiedElectricalWhat This Code MeansECT VOLTAGE HIGHSuggested Actions1Log codes for reference2Select historic or active DTCs using arrow keys or mouse and press Enter to erase them from memoryRelated General Motors Powertrain Fault CodesIAT VOLTAGE HIGHMAP VOLTAGE LOW611DTC 532P0300DTC 434P0336DTC 433DTC 425DTC 424Browse all General Motors Powertrain fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for ECT VOLTAGE HIGH on your specific General Motors Powertrain unit — cited to the OEM manual, not a forum guess.Your question about ECT VOLTAGE HIGHGET THE ANSWERFree account required — we'll bring your question with you.