Dodge P1693 DTC Detected In ECM Or PCM Description Chrysler OBD-II Trouble Code Description for P1693 Dodge DTC Detected In ECM Or PCM OBD-II Trouble Code Description for P1693 Dodge Tachometer Circuit Low Voltage OBD-II Trouble Code Description for P1693 Dodge MIL Circuit Malfunction. Kia OBD-II Trouble Code Description for P1693 Dodge MIL Circuit Malfunction Kia OBD-II Trouble Code Description for P1693 Dodge MIL Circuit Malfunction