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P1602 Hyundai Code - Serial Communication Problem with TCM
Faulty Transaxle Control Module(TCM) or Engine Control Module(ECM)
Transaxle Control Module(TCM) to Engine Control Module(ECM) harness is open or shorted
Transaxle Control Module(TCM) to Engine Control Module(ECM) circuit poor electrical connection
How to Fix the DTC P1602 Hyundai?