P2788
Auto Shift Manual Adaptive Learning at Limit
- Severity
- High
- Driving
- Drive only to a garage
The automated manual transmission's adaptive learning has reached the end of its adjustment range. These transmissions continuously learn where the clutch bites and how long each engagement takes, compensating for wear as it happens. Reaching the limit means there is no compensation left - which on a high-mileage vehicle usually means the clutch is simply worn out.
Possible causes
- CommonClutch worn out, beyond what adaptation can compensate for
- CommonClutch contaminated with oil from a leaking seal
- CommonActuator worn or not achieving full travel
- CommonAdaptation never reset after a clutch replacement
- PossibleLow hydraulic pressure limiting clamping force
- PossibleFaulty position sensor misreporting where the clutch is
What you might notice
- Judder or slipping when moving off
- Harsh or slow gear changes
- Loss of power under acceleration
- Burning smell
- Transmission warning message
What to check, in order
- Ask whether a clutch has been fitted recently without resetting the adaptation. If so, resetting it is the repair and nothing needs replacing.
- Assess clutch wear. On a high-mileage vehicle this code usually means the clutch has reached the end of its life, and no amount of electrical diagnosis changes that.
- Look for oil contamination. A leaking crankshaft rear seal or gearbox input seal soaks the clutch, and replacing the clutch without fixing the leak repeats the failure.
- Run the adaptation procedure and see whether it completes. If it immediately returns to the limit, the mechanical condition is the answer.
- Do not keep driving a clutch that is slipping - it destroys itself quickly and can damage the flywheel with it.
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
P2700P2701P2702P2703P2704P2705P2706P2707P2708P2709P2710P2711P2712P2713P2714P2715P2716P2717P2718P2719P2720P2721P2722P2723P2724P2725P2726P2727P2728P2729P2730P2731P2732P2733P2734P2735P2736P2737P2738P2739P2740P2741P2742P2743P2744P2745P2746P2747P2748P2749P2750P2751P2752P2753P2754P2755P2756P2757P2758P2759P2760P2761P2762P2763P2764P2765P2766P2767P2768P2769P2770P2771P2772P2773P2774P2775P2776P2777P2778P2779P2780P2781P2782P2783P2784P2785P2786P2787P2788P2789P2790P2791P2792P2793P2794P2795