P0808
Clutch Position Sensor Circuit High
- Severity
- Medium
- Driving
- Drivable — book it in
The clutch position sensor signal is stuck high - typically shorted to voltage or an open earth. The module has no usable idea where the clutch is, so it will not attempt to control engagement normally. On many automated transmissions that means the car will not drive at all.
Possible causes
- CommonWiring shorted to voltage or an open earth between the sensor and the module
- CommonCorroded or water-ingressed connector at the sensor
- CommonFailed sensor
- PossibleLoss of the 5 volt reference or the sensor earth
- PossibleChafed harness near the bellhousing
What you might notice
- Transmission will not engage a gear
- Car will not move
- Harsh engagement
- Transmission warning message
- Check engine light on
What to check, in order
- Unplug the sensor and check whether the high reading persists at the harness. If it does, the fault is in the wiring rather than the sensor.
- Check the reference voltage and earth at the sensor - a lost earth commonly drives a signal high, so P0808 is not always a shorted signal wire.
- Inspect the connector for corrosion and water.
- Follow the harness around the bellhousing looking for heat and chafe damage.
- Look for other codes sharing the same reference circuit before condemning this sensor.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Transmission
P0800P0801P0802P0803P0804P0805P0806P0807P0808P0809P0810P0811P0812P0813P0814P0815P0816P0817P0818P0819P0820P0821P0822P0823P0824P0825P0826P0827P0828P0829P0830P0831P0832P0833P0834P0835P0836P0837P0838P0839P0840P0841P0842P0843P0844P0845P0846P0847P0848P0849P0850P0851P0852P0853P0854P0855P0856P0857P0858P0859P0860P0861P0862P0863P0864P0865P0866P0867P0868P0869P0870P0871P0872P0873P0874P0875P0876P0877P0878P0879P0880P0881P0882P0883P0884P0885P0886P0887P0888P0889P0890P0891P0892P0893P0894P0895P0896P0897P0898P0899