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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> (Electronic Shift Module (ESM) - Electrical Diagnostics) >> DTC Troubleshooting >> P1C77-17 - Knob Supply Voltage-Circuit Voltage Above Threshold >> Theory Of Operation

Theory Of Operation

The Electronic Shift Module (ESM) performs various internal tests to verify proper controller operation. This Diagnostic Trouble Code (DTC) indicates that there is a problem with the battery supply voltage.