P2790
Gate Select Direction Circuit
- Severity
- High
- Driving
- Drive only to a garage
A fault in the gate select direction circuit - a general fault, usually a wiring, connector or actuator problem. Inside an automated manual gearbox the selector shaft moves on two axes, exactly as a driver's hand does: this one moves the selector shaft across the gate to choose which pair of gears. Without control of it, gear changes will fail.
Possible causes
- CommonFailed direction control solenoid or actuator
- CommonCorroded or damaged connector at the gearbox
- CommonWiring damage in the actuator harness
- PossibleLow hydraulic pressure on a hydraulically actuated system
- PossibleSticking selector mechanism
- RareFailed control module driver
What you might notice
- Transmission will not select gears
- Car stuck in neutral
- Gear changes failing in one direction only
- Transmission warning message
- Check engine light on
What to check, in order
- Note which gears are still available. If only movement in one direction fails, that confirms one circuit rather than a shared fault.
- Inspect the connector at the gearbox for corrosion and water.
- Measure the solenoid or actuator winding resistance against specification.
- Check hydraulic pressure on a hydraulically actuated system - a slow actuator is more often a pressure problem than a failed motor.
- Run the position calibration procedure after any repair - it is routine on these transmissions, not a last resort.
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