Category: Chevrolet

P0634 Chevrolet Transmission Control Module Overtemperature Possible causes – Obstructions in the airflow of the radiator or transmission cooler– Kinked or damaged transmission fluid lines– Damage to the transmission cooler Tech description Check transmission fluid level and condition and replaced fluid if necessary. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0634…

P0635 Chevrolet Power Steering Control Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0636 Chevrolet Power Steering Control Circuit Low Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0637 Chevrolet Power Steering Control Circuit High Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0638 Chevrolet Throttle Actuator Control Range/Performance Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech description Dirty or clogged throttle body can triggered the P0638 Chevrolet code. Before replacing any parts try cleaning the throttle body and reset the engine light. Symptoms – Engine Light ON (or Service…

P0632 Chevrolet Odometer Not Programmed or Mismatch Possible causes – Engine Control Module (ECM) Programming error– Odometer not programmed to ECM– Faulty or wrong ECM Tech description If a new ECM/PCM is installed in a vehicle, the mileage has to be reprogrammed to the new ECM/PCM What about the obd code? Mileage on odometer does…

P0633 Chevrolet Immobilizer Key Not Programmed 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 P0633 Chevrolet Description The Engine Control Module (ECM), the Powertrain…

P0630 Chevrolet VIN Not Programmed or Mismatch Possible causes – Engine Control Module (ECM) Programming error– Vehicle Identification Number (VIN) not programmed to ECM– Faulty or wrong ECM Tech description If a new ECM is installed in a vehicle, the Vehicle Identification Number (VIN) has to be reprogrammed to the new Engine Control Module (ECM)….

P0631 Chevrolet VIN Not Programmed or Incompatible Transmission Control Module (TCM) OBD Code: System: Subsystem:  P0631 Chevrolet – (ASE)  Powertrain  Computer and Auxiliary Output Circuits Trouble Code Description: VIN Not Programmed or Incompatible Transmission Control Module (TCM) Location: Analysis: Possible Causes:       Tech description:

P0626 Chevrolet Generator Field Terminal Circuit High Possible causes – Faulty battery– Generator drive belt missing or loose– Faulty Generator– Generator harness is open or shorted– Generator circuit poor electrical connection Tech description If the battery is OK then the alternator is more than likely the problem. Symptoms – Engine Light ON (or Service Engine…

P0627 Chevrolet Fuel Pump Control System Malfunction Possible causes – Faulty fuel pump relay– Fuel pump harness is open or shorted– Fuel pump circuit poor electrical connection– Faulty fuel pump control module (if applicable) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0627 Chevrolet Description The Engine Control Module (ECM) has detected…

P0628 Chevrolet Low Voltage Detected At The Fuel Lift Pump Possible causes – Faulty Fuel Lift Pump– Fuel Lift Pump harness is open or shorted– Fuel Lift Pump circuit poor electrical connection Tech description Usually the solution to the problem is the fuel lift pump What about the obd code? – Engine Light ON (or…

P0629 Chevrolet Fuel Pump A Control Circuit High Possible causes – Faulty Fuel Pump– Fuel pump harness is open or shorted– Fuel pump circuit poor electrical connection– Faulty Fuel Pump Relay– Faulty fuel pump control module (if applicable) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0629 Chevrolet Description When the ignition…