Fault codeP0811

MODERATE

Excessive Clutch Slippage

What this code means

Excessive Clutch Slippage.

P0811 is a generic code: it means the same thing on every make. P0811 belongs to family P08xx — Transmission (continued). Its page explains how to read a code and groups all its codes by part.

Automated gearbox actuators

Automated manual gearboxes are manual gearboxes whose clutch and gear changes are operated by actuators, hydraulic or electric. Sensors measure the clutch position and the selector position, and the control unit learns these positions.

What you notice

Jerky starts, a slipping clutch, a gear that will not engage, a gearbox stuck in neutral.

How to check it

Check the hydraulic fluid level if the system uses one, the actuators' connectors and the battery voltage, since these gearboxes are sensitive to it. After any repair or a battery disconnection, a relearn of the positions with a suitable tool is often required.

What to do

Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.

Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back. Clearing a fault code yourself →

How to read this code

PPowertrain
0standardised code
8Transmission (continued)
11P0811