Category: Buick

P0805 Buick Park/Neutral Switch Performance Possible causes – Faulty Park/Neutral Switch– Park/Neutral Switch harness is open or shorted– Park/Neutral Switch circuit poor electrical connection 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 –…

P0802 Buick Transmission Control Module MIL Request 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 –…

P0803 Buick Skip Shift Solenoid Control Circuit Possible causes – Faulty Skip Shift Solenoid– Skip Shift Solenoid harness is open or shorted– Skip Shift Solenoid circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0803 Buick Description An ignition voltage is supplied to the Skip Shift solenoid coil. The…

P0804 Buick Skip Shift Lamp Control Circuit Possible causes – Faulty Skip Shift Lamp– Skip Shift Lamp harness is open or shorted– Skip Shift Lamp circuit poor electrical connection What about the obd code? When the Powertrain Control Module (PCM) commands the control circuit to a component OFF, the voltage potential of the circuit should…

P0797 Buick Pressure Control Solenoid C Stuck On Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty pressure control solenoid valve ‘C’– Pressure control solenoid valve ‘C’ harness is open or shorted– Pressure control solenoid valve ‘C’ circuit poor electrcial connection What about the obd code? The gear required by the ECM does…

P0798 Buick Pressure Control Solenoid C Electrical Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty pressure control solenoid valve ‘C’– Pressure control solenoid valve ‘C’ harness is open or shorted– Pressure control solenoid valve ‘C’ circuit poor electrcial connection What about the obd code? The P0798 Buick is triggered when the ECM…

P0799 Buick Pressure Control Solenoid C Intermittent Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty pressure control solenoid valve ‘C’– Pressure control solenoid valve ‘C’ harness is open or shorted– Pressure control solenoid valve ‘C’ circuit poor electrcial connection What about the obd code? The P0799 Buick is triggered when the ECM…

P0800 Buick Transfer Case Control System (Malfunction Indicator Light (MIL) Request) OBD Code: System: Subsystem:  P0800 Buick – (ASE)  Powertrain  Transmission Controls Trouble Code Description: Transfer Case Control System (Malfunction Indicator Light (MIL) Request) Location: Analysis: Possible Causes:       Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick…

P0801 Buick Reverse Inhibit Solenoid Control Circuit Possible causes – Faulty Reverse Inhibit Solenoid– Reverse Inhibit Solenoid harness is open or shorted– Reverse Inhibit Solenoid circuit poor electrical connection What about the obd code? When the Reverse Inhibit solenoid energizes, the operator can shift the transmission into reverse. The Powertrain Control Module (PCM) enables the…

P0793 Buick Intermediate Shaft Speed Sensor A Possible causes – Faulty Shaft Speed Sensor– Shaft Speed Sensor harness is open or shorted– Shaft Speed Sensor circuit poor electrical connection What about the obd code? The P0793 Buick code is detected when the vehicle speed is more than the 31 mph and the park/neutral switch is…

P0794 Buick Intermediate Input Shaft Speed Sensor Signal Possible causes – Faulty Shaft Speed Sensor– Shaft Speed Sensor harness is open or shorted– Shaft Speed Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0794 Buick Description This sensor detects the rotation speed of the counter gear. By…

P0795 Buick Pressure Control Solenoid Valve C Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty pressure control solenoid valve ‘C’– Pressure control solenoid valve ‘C’ harness is open or shorted– Pressure control solenoid valve ‘C’ circuit poor electrcial connection What about the obd code? The P0795 Buick code is detected when the…

P0796 Buick Pressure Control Solenoid C Stuck Off Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty pressure control solenoid valve ‘C’– Pressure control solenoid valve ‘C’ harness is open or shorted– Pressure control solenoid valve ‘C’ circuit poor electrcial connection What about the obd code? The gear required by the ECM does…

P0789 Buick Shift/Timing Solenoid Intermittent 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 Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse –…

P0790 Buick Normal/Performance Switch Circuit 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…

P0791 Buick Intermediate Shaft Speed Sensor A Circuit Possible causes – Faulty intermediate shaft speed sensor– Intermediate shaft speed sensor harness is open or shorted– Intermediate shaft speed sensor circuit poor electrical connection What about the obd code? P0791 Buick code is detected when the input speed sensor voltage is more than 1.9V or less…

P0792 Buick Compounder Speed Sensor Ratio Error Possible causes – Intermittent gear ratio problems– Internal transmission problems What about the obd code? The P0792 Buick code is detected if there is an excessive change in the output rpm in any gear. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal…

P0784 Buick 4-5 Shift Malfunction 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 What about the obd code? The P0784 Buick code is detected when actual gear position and the commanded gear position are…

P0785 Buick 3-2 Shift Solenoid Circuit Electrical 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 What about the obd code? When the Powertrain Control Module (PCM) detects a continuous open, short to ground or…

P0786 Buick Shift/Timing Solenoid Range/Performance 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 Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse –…