Category: OBDii Powertrain Codes

P0800 Transfer Case Control System (Malfunction Indicator Light (MIL) Request) OBD Code: System: Subsystem:  P0800 – (ASE)  Powertrain  Transmission Controls Trouble Code Description: Transfer Case Control System (Malfunction Indicator Light (MIL) Request) Location: Analysis: Possible Causes:       Tech description:

P0801 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 Reverse…

P0802 Transmission Control Module MIL Request Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0803 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 Description An ignition voltage is supplied to the Skip Shift solenoid coil. The Powertrain Control…

P0796 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 not…

P0797 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 not…

P0798 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 is triggered when the ECM detects an…

P0799 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 is triggered when the ECM detects an…

P0788 3-2 Shift Solenoid Control Circuit High Voltage 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? Code P0788 is detected when the Engine Control Module (ECM) detects open in…

P0789 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)

P0790 Normal/Performance Switch Circuit Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0791 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 code is detected when the input speed sensor voltage is more than 1.9V or less than 0.1V…

P0792 Compounder Speed Sensor Ratio Error Possible causes – Intermittent gear ratio problems– Internal transmission problems What about the obd code? The P0792 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)

P0793 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 code is detected when the vehicle speed is more than the 31 mph and the park/neutral switch is OFF or…

P0794 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 Description This sensor detects the rotation speed of the counter gear. By comparing the…

P0795 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 code is detected when the when normal…

P0784 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 code is detected when actual gear position and the commanded gear position are different Symptoms…

P0785 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 short…