Category: Cadillac

P1642 Cadillac FC Relay 2 And 3 Control Circuit Possible causes – Faulty Cooling Fan Relay– Cooling Fan Relay harness is open or shorted– Cooling Fan Relay circuit poor electrical component Symptoms – Engine Light ON (or Service Engine Soon Warning Light) – Cooling Fan not working P1642 Cadillac Description Ignition voltage is supplied to…

P1643 Cadillac Engine Speed Output Circuit Possible causes – Reprogram computer – Faulty ECM Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1643 Cadillac Description There is a communication problem with Control Area Network (CAN) link from the Engine Control Module (ECM)to the Transmission Control Module (TCM) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac…

P1644 Cadillac Traction Control Delivered Torque Output Circuit Possible causes – Poor connection at the AC motor control module – Open or short circuit condition – Failed AC Motor Control Module What about the obd code? No duty signals are input from the MCM for at least 5 seconds. Symptoms – Engine Light ON (or…

P1639 Cadillac PCM 5 Volt Reference Voltage Circuit Condition Possible causes – Sensor using 5 volt reference line shorted to ground– Circuit short to ground What about the obd code? If the voltage is out of tolerance, the PCM will set DTC P1639 Cadillac. Symptoms – Engine Light ON (or Service Engine Soon Warning Light)…

P1640 Cadillac Powertrain DTCs Available in Another Module Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan…

P1641 Cadillac FC Relay 1 Control Circuit Possible causes – Faulty Cooling Fan Relay– Cooling Fan Relay harness is open or shorted– Cooling Fan Relay circuit poor electrical component Symptoms – Engine Light ON (or Service Engine Soon Warning Light) – Cooling Fan not working P1641 Cadillac Description Ignition voltage is supplied to the Cooling…

P1635 Cadillac 5 Volt Reference Circuit Possible causes – A/C Pressure sensor harness is open or shorted– MAP sensor harness is open or shorted– EGR valve harness is open or shorted What about the obd code? The P1635 Cadillac code is set when the reference voltage from the sensor is our of range. Symptoms –…

P1636 Cadillac Inductive Signature Chip Communication Error Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan ,…

P1637 Cadillac Can Link ECM/ABSCM Circuit / Net Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan…

P1638 Cadillac ECM (Microcontroller) – Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac…

P1631 Cadillac Communication Error Between From ECM To VSC Possible causes – Skid Control ECU / Engine Control Module (ECM) harness is open or shorted– Skid Control ECU / Engine Control Module (ECM) circuit poor electrical connection– Faulty Skid Control ECU– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon…

P1632 Cadillac Theft Deterrent Start Disable Signal Received Possible causes – Deterrent key not programmed to vheicle– Faulty Deterrent key– Fualty ignition switch– Poor electrical connection for Deterrent circuit components Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No or hard engine start situation P1632 Cadillac Description The Engine Control Module (ECM),…

P1633 Cadillac ECM Malfunction ETCS Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac…

P1634 Cadillac Output Link Circuit Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac…

P1629 Cadillac Theft Deterrent Start Enable Signal Not Received Possible causes – Deterrent key not programmed to vheicle– Faulty Deterrent key– Fualty ignition switch– Poor electrical connection for Deterrent circuit components Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No or hard engine start situation P1629 Cadillac Description The Engine Control Module…

P1630 Cadillac Communication Error Between From ECM To VSC Possible causes – Skid Control ECU / Engine Control Module (ECM) harness is open or shorted– Skid Control ECU / Engine Control Module (ECM) circuit poor electrical connection– Faulty Skid Control ECU– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon…

P1627 Cadillac Module Supply Voltage Out Of Range Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan…

P1628 Cadillac Module Ignition Supply Input Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan ,…

P1623 Cadillac Immobilizer Code Word/ID Number Write Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1623 Cadillac Information for specific makes Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan ,…

P1624 Cadillac Customer Snapshot Requested – Data Available Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan…