P0811 code meaning
Excessive Clutch A Slippage
Powertrain system Generic code P08xx codes Check engine light
What P0811 means
P0811 means clutch A slips too much while it should be closed – on a dual-clutch gearbox clutch 1 with the odd gears. The module compares engine speed with the input shaft speed of the closed clutch; thresholds are not published. Audi's seven-speed S tronic DL382 (A4 to A7 and Q5, 2020–24) sets it intermittently together with P081E and input speed sensor codes, partly also clutch temperature too high; the cause was the transmission module calculating wrong slip, and the fix was a new module. Genuine slip from wear or overheating shows as flaring take-off and burnt fluid. The module limits torque, may lock out the affected half and go to limp mode.
P0811 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0811
- Transmission warning, limp mode
- Engine flares, poor acceleration
- Judder on take-off
- Burning smell
Common causes of P0811
- Most likelyTransmission module calculating wrong slip (speed capture)
- PossibleClutch worn or overheated
- PossibleFluid burnt or wrong (wet clutch)
- PossibleClutch pressure or actuator too low
- Less likelyInput speed sensor faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission clutchesTransmission control moduleInput speed sensorTransmission fluid
What each part of P0811 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| 11 | The exact fault in that area. |
What to do next
- Note P0811 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0811
What does P0811 mean?
P0811 means "Excessive Clutch A Slippage". P0811 means clutch A slips too much while it should be closed – on a dual-clutch gearbox clutch 1 with the odd gears. It is a generic code, so it means the same on every make.
Is it safe to drive with P0811?
Drive gently and only to a workshop. With P0811 the car can go into limp mode (reduced power) to protect itself.
Will P0811 fail an emissions test?
Yes, it can. P0811 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0811 to fix?
Difficulty: hard. A typical repair takes 1 to 8 hours of work. This is a job for a workshop.
Will P0811 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.