Category: Buick

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

P1644 Buick 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…

P1638 Buick ECM (Microcontroller) – Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave…

P1639 Buick 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 Buick. Symptoms – Engine Light ON (or Service Engine Soon Warning Light)…

P1640 Buick Powertrain DTCs Available in Another Module Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano –…

P1641 Buick 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 Buick Description Ignition voltage is supplied to the Cooling…

P1634 Buick Output Link Circuit Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave…

P1635 Buick 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 Buick code is set when the reference voltage from the sensor is our of range. Symptoms –…

P1636 Buick Inductive Signature Chip Communication Error Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick…

P1637 Buick Can Link ECM/ABSCM Circuit / Net Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano –…

P1630 Buick 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…

P1631 Buick 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 Buick 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 Buick Description The Engine Control Module (ECM),…

P1633 Buick ECM Malfunction ETCS Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave…

P1629 Buick 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 Buick Description The Engine Control Module…

P1627 Buick Module Supply Voltage Out Of Range Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano –…

P1628 Buick Module Ignition Supply Input Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick…

P1623 Buick Immobilizer Code Word/ID Number Write Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1623 Buick Information for specific makes Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue –…

P1624 Buick Customer Snapshot Requested – Data Available Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano –…

P1625 Buick PCM System Reset Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave –…