Block of codes
P08xx codes: transmission
This block brings together the codes from P0800 to P0899 in the glossary. Open yours to see what it means, its causes and whether you can keep driving.
Reviewed by Daniel Morales, founder of Reprorace SL, on
What this block covers
Transmission
The gearbox, especially automatic ones: its sensors, solenoids and torque converter. A fault may lock it in one gear (limp-home mode) or cause harsh shifts.
Electrical system (12 V, starting and charging)
The battery, charging and the 12 V system and, on diesels, the glow plugs that help the engine start from cold.
Control modules and outputs
The car's control units and the reference voltages they feed their sensors with. Sometimes the fault is in the control unit; often it is in its power supply or wiring.
The 114 codes of the block
- P0800Transfer case control system: MIL illumination requested
- P0801Reverse inhibit, control circuit open
- P0802Transmission control system MIL, request circuit open
- P0803Upshift/skip shift solenoid, control circuit: malfunction
- P0804Upshift/skip shift lamp, control circuit: malfunction
- P0805Clutch position sensor A, circuit: malfunction
- P0806Clutch position sensor A, circuit: range/performance
- P0807Clutch position sensor A, circuit: signal low
- P0808Clutch position sensor A, circuit: signal high
- P0809Clutch position sensor A, circuit: intermittent
- P080AClutch position: not learned
- P080BUpshift/skip shift solenoid, control circuit: range/performance
- P080CUpshift/skip shift solenoid, control circuit: signal low
- P080DUpshift/skip shift solenoid, control circuit: signal high
- P0810Clutch position control: error
- P0811Clutch A: excessive slippage
- P0812Reverse, input circuit: malfunction
- P0813Reverse, output circuit: malfunction
- P0814Transmission range display, circuit: malfunction
- P0815Upshift switch, circuit: malfunction
- P0816Downshift switch, circuit: malfunction
- P0817Starter disable, circuit open
- P0818Driveline disconnect switch, input circuit: malfunction
- P0819Correlation fault between the up/down shift switch and the transmission range
- P081AStarter disable, circuit: signal low
- P081BStarter disable, circuit: signal high
- P081CPark, input circuit: malfunction
- P081DNeutral, input circuit: malfunction
- P081EClutch B: excessive slippage
- P0820Gear lever X-Y position sensor, circuit: malfunction
- P0821Gear lever X position sensor 1, circuit: malfunction
- P0822Gear lever Y position sensor 1, circuit: malfunction
- P0823Gear lever X position sensor 1, circuit: intermittent/erratic
- P0824Gear lever Y position sensor 1, circuit: intermittent/erratic
- P0825Gear lever push-pull switch (shift anticipate): malfunction
- P0826Up and down shift switch, circuit: malfunction
- P0827Up and down shift switch, circuit: signal low
- P0828Up and down shift switch, circuit: signal high
- P08295-6 shift: malfunction
- P082AGear lever X position sensor 1, circuit: range/performance
- P082BGear lever X position sensor 1, circuit: signal low
- P082CGear lever X position sensor 1, circuit: signal high
- P082DGear lever Y position sensor 1, circuit: range/performance
- P082EGear lever Y position sensor 1, circuit: signal low
- P082FGear lever Y position sensor 1, circuit: signal high
- P0830Clutch pedal switch A, circuit: malfunction
- P0831Clutch pedal switch A, circuit: signal low
- P0832Clutch pedal switch A, circuit: signal high
- P0833Clutch pedal switch B, circuit: malfunction
- P0834Clutch pedal switch B, circuit: signal low
- P0835Clutch pedal switch B, circuit: signal high
- P0836Four wheel drive (4WD) switch, circuit: malfunction
- P0837Four wheel drive (4WD) switch, circuit: range/performance
- P0838Four wheel drive (4WD) switch, circuit: signal low
- P0839Four wheel drive (4WD) switch, circuit: signal high
- P083FClutch pedal switch A/B: correlation fault
- P0840Transmission fluid pressure sensor/switch A, circuit: malfunction
- P0841Transmission fluid pressure sensor/switch A, circuit: range/performance
- P0842Transmission fluid pressure sensor/switch A, circuit: signal low
- P0843Transmission fluid pressure sensor/switch A, circuit: signal high
- P0844Transmission fluid pressure sensor/switch A, circuit: intermittent
- P0845Transmission fluid pressure sensor/switch B, circuit: malfunction
- P0846Transmission fluid pressure sensor/switch B, circuit: range/performance
- P0847Transmission fluid pressure sensor/switch B, circuit: signal low
- P0848Transmission fluid pressure sensor/switch B, circuit: signal high
- P0849Transmission fluid pressure sensor/switch B, circuit: intermittent
- P084FPark/neutral switch, output circuit: malfunction
- P0850Park/neutral switch, input circuit: malfunction
- P0851Park/neutral switch, input circuit: signal low
- P0852Park/neutral switch, input circuit: signal high
- P0853Drive switch, input circuit: malfunction
- P0854Drive switch, input circuit: signal low
- P0855Drive switch, input circuit: signal high
- P0856Traction control input signal: malfunction
- P0857Traction control input signal: range/performance
- P0858Traction control input signal: signal low
- P0859Traction control input signal: signal high
- P085AGear shift control module B, communication circuit: malfunction
- P085BGear shift control module B, communication circuit: signal low
- P085CGear shift control module B, communication circuit: signal high
- P085DGear shift control module A: performance
- P085EGear shift control module B: performance
- P0860Gear shift control module A, communication circuit: malfunction
- P0861Gear shift control module A, communication circuit: signal low
- P0862Gear shift control module A, communication circuit: signal high
- P0863TCM, communication circuit: malfunction
- P0864TCM, communication circuit: range/performance
- P0865TCM, communication circuit: signal low
- P0866TCM, communication circuit: signal high
- P0867Transmission fluid pressure: malfunction
- P0868Transmission fluid pressure: too low
- P0869Transmission fluid pressure: too high
- P0880TCM power input signal: malfunction
- P0881TCM power input signal: range/performance
- P0882TCM power input signal: signal low
- P0883TCM power input signal: signal high
- P0884TCM power input signal: intermittent
- P0885TCM power relay, control circuit open
- P0886TCM power relay, control circuit: signal low
- P0887TCM power relay, control circuit: signal high
- P0888TCM power relay, sense circuit: malfunction
- P0889TCM power relay, sense circuit: range/performance
- P088ATransmission fluid filter: deteriorated
- P088BTransmission fluid filter: severely deteriorated
- P0890TCM power relay, sense circuit: signal low
- P0891TCM power relay, sense circuit: signal high
- P0892TCM power relay, sense circuit: intermittent
- P0893Multiple gears engaged
- P0894Transmission component: slipping
- P0895Shift time: too short
- P0896Shift time: too long
- P0897Transmission fluid: deteriorated
- P0898Transmission control system MIL, request circuit: signal low
- P0899Transmission control system MIL, request circuit: signal high
Other blocks
Read your car's fault codes on your phone
With an ECO-LITE in the OBD socket you see the codes in your account, with the data captured when the fault happened, and your workshop can check them remotely, always with your permission.
Keep reading
- OBD fault codes: what each one means
- Check engine light on: what to do
- How to read and clear your car's fault codes
- Will your car pass its MOT or inspection with the engine light on?
- Wi-Fi OBD2 reader: which one to choose
- Reading fault codes by car make
- Remote OBD diagnostics: what it is, how it works and what it can't do
- Vehicle diagnostics glossary