P0711 Fault Code in Audi: Causes, Symptoms, and Fixes

The P0711 fault code indicates that the Transmission Control Module (TCM) has detected an abnormal or implausible signal from the Transmission Fluid Temperature (TFT) Sensor “A” — either it’s too high, too low, or not changing as expected.

Common Symptoms:

1.️ Check Engine Light (CEL)
2.️ Harsh or delayed shifting
3. Torque converter not locking properly
4. Transmission may enter limp mode
5. Poor cold-weather shifting
6. Overheating transmission not detected correctly

Common Causes:

1. Faulty or inaccurate transmission fluid temperature sensor
2. Sensor stuck at a fixed temperature (no fluctuation)
3. Contaminated or degraded transmission fluid
4. Wiring issues – short to ground, open circuit, or connector corrosion
5. Internal TCM malfunction (rare)

How to Fix P0711:

✅ Step-by-step:
1. Scan live data from TFT sensor
– If temp reads constant (e.g. −40°C or 150°C), it’s likely bad or disconnected
2. Check transmission fluid condition
– Old, burnt, or very cold fluid can trigger this code — replace if needed
3. Inspect and clean sensor connector
– Look for water intrusion, loose pins, or broken wires
4. Test sensor resistance with multimeter
– Resistance should vary with temperature (e.g. ~1000 ohms at ~90°C)
5. Replace the sensor
– Usually located on the valve body or inside the transmission pan
6. Clear the code and test drive

Common In:

1. Audi / VW DSG
2. ZF 6HP / 8HP
3. Hyundai, Toyota, Ford, BMW, Mercedes, and others with electronic transmissions