Cadillac specific DTC OBD2 code: P1641 FC Relay 1 Control Circuit
Cadillac specific DTC OBD2 code: P1660 Cooling Fans Control Circuit
Cadillac specific DTC OBD2 code: P1626 Theft Deterrent Fuel Enable Signal Lost
Cadillac specific DTC OBD2 code: P1642 FC Relay 2 And 3 Control Circuit
Cadillac specific DTC OBD2 code: P1661 MIL Control Circuit
Cadillac specific DTC OBD2 code: P1627 A/D Performance
Cadillac specific DTC OBD2 code: P1643 Engine Speed Output Circuit
Cadillac specific DTC OBD2 code: P1662 Cruise Control Inhibit Control Circuit
Cadillac specific DTC OBD2 code: P1628 ECT Pull-Up Resistor
Cadillac specific DTC OBD2 code: P1644 TP Output Circuit