Tag: GMC

Possible causes – Reprogram TCM and recheck code– Replace Transmission Control Module (TCM) Sensor/body assembly one piece Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1684 GMC OBD Code Description The Transmission Control Module (TCM) power up the temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly…

Possible causes – Reprogram TCM and recheck code– Replace Transmission Control Module (TCM) Sensor/body assembly one piece Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1685 GMC OBD Code Description The Transmission Control Module (TCM) power up the temperature sensor is located inside of the control solenoid (w/body and TCM) valve assembly…

Possible causes – Missing or loose fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– EVAP canister or fuel tank leaks– EVAP system hose leaking– Fuel tank leaking– Faulty vent solenoid– Faulty EVAP purge switch Tech description The P0440 code means…

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 GMC OBD Code Description The control…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty Pressure Control Solenoid– Pressure Control Solenoid harness is open or shorted– Pressure Control Solenoid circuit poor electrical connection When is the obd code mean? When the Powertrain Control Module (PCM) detects a continuous open or short in the Pressure Control (PC) solenoid valve circuit…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty shifting solenoid valve– Shifting solenoid valve harness is open or shorted– Shifting solenoid valve circuit poor electrical connection When is the obd code mean? When the Powertrain Control Module (PCM) detects a continuous open, short to ground or short to power in the 3-2…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty torque converter clutch solenoid valve– Torque converter clutch solenoid valve harness is open or shorted– Torque converter clutch solenoid valve circuit poor electrical connection When is the obd code mean? When the PCM detects a continuous open, short to ground or short to power…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty torque converter clutch solenoid valve– Torque converter clutch solenoid valve harness or connectors– Torque converter clutch solenoid valve circuit is open or shorted– Transmission internal mechanical problem Tech description When the a transmission solenoid is stuck on, in most cases the problem is not…

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty torque converter clutch solenoid valve– Torque converter clutch solenoid valve harness or connectors– Torque converter clutch solenoid valve circuit is open or shorted– Transmission internal mechanical problem When is the obd code mean? Lock-up does not occur when driving in lock-up range or lockup…

Possible causes – Low transmission fluid level– Transmission cooling system concerns When is the obd code mean? When the Powertrain Control Module (PCM) detects a high transmission fluid temperature (TFT) for a long period of time, then code P0218 will set. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0218 GMC OBD…