P0711Transmission Fluid Temperature Sensor "A" Circuit Range/Performance
What it means
The transmission fluid temperature reading doesn't change as expected while driving.
Symptoms
- Harsh, late or missing shifts
- Transmission in limp mode (stuck in one gear)
- Gearbox or check engine warning light
Common causes
- Faulty sensor
- Real overheating (towing, low fluid)
- Cooler fault
What to check first
- Graph the fluid temperature on a road test
- Check fluid level and cooler
- Measure the sensor resistance
Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.