OBD2 · Powertrain
P08xx codes: transmission — switches, fluid pressure, 4WD and clutch
117 codes in this range, all generic — the same meaning on every make. Automatic, dual-clutch and automated manual transmissions: shift and pressure-control solenoids, speed sensors, gear-ratio monitoring, the torque converter clutch, fluid temperature and pressure, range sensors and transfer cases.
What usually causes codes in this area
- Low, old or wrong transmission fluid
- Failed solenoids or speed sensors
- Wiring and connectors at the transmission
- Internal wear — clutches, bands, the torque converter
Can you keep driving?
Drive gently and get it diagnosed soon. If the transmission is in limp mode, slipping or shifting harshly, keep driving to a minimum — carrying on can turn a sensor fault into a rebuild.
All P08xx codes
| Code | Meaning |
|---|---|
| P0800 | Transfer Case Control System (MIL Request) |
| P0801 | Reverse Inhibit Control Circuit |
| P0802 | Transmission Control System MIL Request Circuit/Open |
| P0803 | 1-4 Upshift (Skip Shift) Solenoid Control Circuit |
| P0804 | 1-4 Upshift (Skip Shift) Lamp Control Circuit |
| P0805 | Clutch Position Sensor Circuit |
| P0806 | Clutch Position Sensor Circuit Range/Performance |
| P0807 | Clutch Position Sensor Circuit Low |
| P0808 | Clutch Position Sensor Circuit High |
| P0809 | Clutch Position Sensor Circuit Intermittent |
| P080A | Clutch Position Not Learned |
| P0810 | Clutch Position Control Error |
| P0811 | Excessive Clutch Slippage |
| P0812 | Reverse Input Circuit |
| P0813 | Reverse Output Circuit |
| P0814 | Transmission Range Display Circuit |
| P0815 | Upshift Switch Circuit |
| P0816 | Downshift Switch Circuit |
| P0817 | Starter Disable Circuit |
| P0818 | Driveline Disconnect Switch Input Circuit |
| P0819 | Up and Down Shift Switch to Transmission Range Correlation |
| P081A | Starter Disable Circuit Low |
| P081B | Starter Disable Circuit High |
| P081C | Park Input Circuit |
| P081D | Neutral Input Circuit |
| P0820 | Gear Lever X-Y Position Sensor Circuit |
| P0821 | Gear Lever X Position Circuit |
| P0822 | Gear Lever Y Position Circuit |
| P0823 | Gear Lever X Position Circuit Intermittent |
| P0824 | Gear Lever Y Position Circuit Intermittent |
| P0825 | Gear Lever Push-Pull Switch (Shift Anticipate) |
| P0826 | Up and Down Shift Switch Circuit |
| P0827 | Up and Down Shift Switch Circuit Low |
| P0828 | Up and Down Shift Switch Circuit High |
| P0829 | 5-6 Shift |
| P0830 | Clutch Pedal Switch "A" Circuit |
| P0831 | Clutch Pedal Switch "A" Circuit Low |
| P0832 | Clutch Pedal Switch "A" Circuit High |
| P0833 | Clutch Pedal Switch "B" Circuit |
| P0834 | Clutch Pedal Switch "B" Circuit Low |
| P0835 | Clutch Pedal Switch "B" Circuit High |
| P0836 | Four Wheel Drive (4WD) Switch Circuit |
| P0837 | Four Wheel Drive (4WD) Switch Circuit Range/Performance |
| P0838 | Four Wheel Drive (4WD) Switch Circuit Low |
| P0839 | Four Wheel Drive (4WD) Switch Circuit High |
| P083A | Transmission Fluid Pressure Sensor/Switch "G" Circuit |
| P083B | Transmission Fluid Pressure Sensor/Switch "G" Circuit Range/Performance |
| P083C | Transmission Fluid Pressure Sensor/Switch "G" Circuit Low |
| P083D | Transmission Fluid Pressure Sensor/Switch "G" Circuit High |
| P083E | Transmission Fluid Pressure Sensor/Switch "G" Circuit Intermittent |
| P0840 | Transmission Fluid Pressure Sensor/Switch "A" Circuit |
| P0841 | Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance |
| P0842 | Transmission Fluid Pressure Sensor/Switch "A" Circuit Low |
| P0843 | Transmission Fluid Pressure Sensor/Switch "A" Circuit High |
| P0844 | Transmission Fluid Pressure Sensor/Switch "A" Circuit Intermittent |
| P0845 | Transmission Fluid Pressure Sensor/Switch "B" Circuit |
| P0846 | Transmission Fluid Pressure Sensor/Switch "B" Circuit Range/Performance |
| P0847 | Transmission Fluid Pressure Sensor/Switch "B" Circuit Low |
| P0848 | Transmission Fluid Pressure Sensor/Switch "B" Circuit High |
| P0849 | Transmission Fluid Pressure Sensor/Switch "B" Circuit Intermittent |
| P084A | Transmission Fluid Pressure Sensor/Switch "H" Circuit |
| P084B | Transmission Fluid Pressure Sensor/Switch "H" Circuit Range/Performance |
| P084C | Transmission Fluid Pressure Sensor/Switch "H" Circuit Low |
| P084D | Transmission Fluid Pressure Sensor/Switch "H" Circuit High |
| P084E | Transmission Fluid Pressure Sensor/Switch "H" Circuit Intermittent |
| P0850 | Park/Neutral Switch Input Circuit |
| P0851 | Park/Neutral Switch Input Circuit Low |
| P0852 | Park/Neutral Switch Input Circuit High |
| P0853 | Drive Switch Input Circuit |
| P0854 | Drive Switch Input Circuit Low |
| P0855 | Drive Switch Input Circuit High |
| P0856 | Traction Control Input Signal |
| P0857 | Traction Control Input Signal Range/Performance |
| P0858 | Traction Control Input Signal Low |
| P0859 | Traction Control Input Signal High |
| P0860 | Gear Shift Module Communication Circuit |
| P0861 | Gear Shift Module Communication Circuit Low |
| P0862 | Gear Shift Module Communication Circuit High |
| P0863 | TCM Communication Circuit |
| P0864 | TCM Communication Circuit Range/Performance |
| P0865 | TCM Communication Circuit Low |
| P0866 | TCM Communication Circuit High |
| P0867 | Transmission Fluid Pressure |
| P0868 | Transmission Fluid Pressure Low |
| P0869 | Transmission Fluid Pressure High |
| P0870 | Transmission Fluid Pressure Sensor/Switch "C" Circuit |
| P0871 | Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance |
| P0872 | Transmission Fluid Pressure Sensor/Switch "C" Circuit Low |
| P0873 | Transmission Fluid Pressure Sensor/Switch "C" Circuit High |
| P0874 | Transmission Fluid Pressure Sensor/Switch "C" Circuit Intermittent |
| P0875 | Transmission Fluid Pressure Sensor/Switch "D" Circuit |
| P0876 | Transmission Fluid Pressure Sensor/Switch "D" Circuit Range/Performance |
| P0877 | Transmission Fluid Pressure Sensor/Switch "D" Circuit Low |
| P0878 | Transmission Fluid Pressure Sensor/Switch "D" Circuit High |
| P0879 | Transmission Fluid Pressure Sensor/Switch "D" Circuit Intermittent |
| P0880 | TCM Power Input Signal |
| P0881 | TCM Power Input Signal Range/Performance |
| P0882 | TCM Power Input Signal Low |
| P0883 | TCM Power Input Signal High |
| P0884 | TCM Power Input Signal Intermittent |
| P0885 | TCM Power Relay Control Circuit/Open |
| P0886 | TCM Power Relay Control Circuit Low |
| P0887 | TCM Power Relay Control Circuit High |
| P0888 | TCM Power Relay Sense Circuit |
| P0889 | TCM Power Relay Sense Circuit Range/Performance |
| P088A | Transmission Fluid Filter Deteriorated |
| P088B | Transmission Fluid Filter Very Deteriorated |
| P0890 | TCM Power Relay Sense Circuit Low |
| P0891 | TCM Power Relay Sense Circuit High |
| P0892 | TCM Power Relay Sense Circuit Intermittent |
| P0893 | Multiple Gears Engaged |
| P0894 | Transmission Component Slipping |
| P0895 | Shift Time Too Short |
| P0896 | Shift Time Too Long |
| P0897 | Transmission Fluid Deteriorated |
| P0898 | Transmission Control System MIL Request Circuit Low |
| P0899 | Transmission Control System MIL Request Circuit High |
Read the codes from your own car
Plug an inexpensive Bluetooth LE or Wi-Fi OBD2 adapter into the port under the dashboard, and Brimly on your iPhone reads the stored, pending and permanent codes, explains each one offline and clears them once the fault is fixed. OBD diagnostics are part of Brimly Forever, a one-time purchase.
Requires iOS 18.1 or later. Free to download, with optional in-app purchases.