Fault Codes/General Motors Powertrain/DTC 122General Motors PowertrainDTC 122UnclassifiedGeneralWhat This Code MeansDTC 122Possible Causes•Unresolved condition related to DTC 112Suggested Actions1Repair DTC 112 firstRelated General Motors Powertrain Fault CodesDTC 416DTC 422DTC 112DTC 423651DTC 424432DTC 434431DTC 532426421Browse all General Motors Powertrain fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for DTC 122 on your specific General Motors Powertrain unit — cited to the OEM manual, not a forum guess.Your question about DTC 122GET THE ANSWERFree account required — we'll bring your question with you.