P2755
Transmission Fluid Cooler Control Circuit High
- Severity
- Medium
- Driving
- Drivable — book it in
The transmission fluid cooler control circuit is reading high - typically shorted to voltage or a lost earth. The module cannot control the cooler path, so fluid temperature will not be managed as intended.
Possible causes
- CommonFailed fluid cooler control valve or its solenoid
- CommonCorroded connector or damaged wiring
- CommonBlocked or restricted fluid cooler
- PossibleBlown fuse on the circuit
- RareFailed control module driver
What you might notice
- Transmission running hot
- Transmission overheat warning
- Harsh shifting when hot
- Slow to warm up in cold weather
- Check engine light on
What to check, in order
- Disconnect the control valve and check whether the high reading persists at the harness.
- Check the cooler and its lines for blockage, leaks and external debris.
- Inspect the connector and wiring at the control valve.
- Measure the solenoid winding resistance against specification.
- Watch transmission fluid temperature on a normal drive - it should rise and then hold steady.
- Check the fluid level and condition first. It is the cheapest check and it explains more transmission complaints than every electrical fault combined.
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