P2771
Four Wheel Drive (4WD) Low Switch Circuit
- Severity
- Medium
- Driving
- Drivable — book it in
A fault in the four-wheel drive low range switch circuit. This switch tells the module that low range has been selected, which matters because the transmission's shift points and the stability systems all need to know the gearing has changed.
Possible causes
- CommonFailed or worn switch
- CommonWiring or connector fault
- CommonCorroded connector - underbody switches take road spray and salt
- PossibleSwitch out of adjustment or its linkage worn
- PossibleDamaged clock spring, on steering-wheel-mounted controls
What you might notice
- Low range will not engage
- Drive mode indicator wrong
- Shift points wrong in low range
- Stability control behaving oddly
- Check engine light on
What to check, in order
- Watch the switch state on the live data screen while selecting low range.
- Inspect the switch connector underneath - corrosion here is the most common cause by a wide margin.
- Check the transfer case actuator completes its travel. A switch reporting correctly on a mechanism that has not fully engaged is not a switch fault.
- Check the transfer case fluid level while underneath.
- Check for transfer case codes stored alongside.
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