What Does P0711 Mean?
The transmission fluid temperature sensor A circuit is reporting values that are outside the expected range or not responding properly to temperature changes. The sensor may be slow to respond, stuck at one temperature, or not tracking ambient temperature on cold start. This prevents the TCM from correctly adjusting shift patterns for fluid temperature.
Common Causes
35%
Degraded or failing TFT sensor with incorrect resistance curve
25%
Contaminated or severely degraded transmission fluid affecting heat transfer to sensor
20%
High resistance in the sensor circuit wiring (corroded connectors or splices)
10%
Thermostat or cooling system issue causing actual fluid temperature to be out of range
10%
TCM calibration issue or software requiring update
Diagnostic Steps
1
After an overnight cold soak, compare the TFT sensor reading to the engine coolant temperature sensor and ambient air temperature. All three should be within 5-10°F of each other when cold.
2
Drive the vehicle until the transmission reaches operating temperature (170-200°F). The TFT reading should rise smoothly. A reading that jumps, stalls, or never reaches operating temp indicates a fault.
3
Measure the TFT sensor resistance at known temperatures (cold and hot). Compare to the manufacturer's resistance vs. temperature chart. Deviations of more than 10% indicate a failing sensor.
4
Inspect the transmission fluid condition — color, smell, and level. Dark, burnt-smelling fluid should be replaced as part of diagnosis.
5
Check for restricted airflow through the transmission cooler or a malfunctioning auxiliary cooler fan if equipped.
Estimated Repair Cost
$80 - $400
Parts + labor, varies by vehicle and location
The transmission fluid temperature sensor A circuit is reporting values that are outside the expected range or not responding properly to temperature changes. The sensor may be slow to respond, stuck at one temperature, or not tracking ambient temperature on cold start. This prevents the TCM from co...
The most common cause of P0711 (Transmission Fluid Temperature Sensor A Circuit Range/Performance) is: Degraded or failing TFT sensor with incorrect resistance curve
Typical repair costs for P0711 range from $80 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive short-term, but the transmission cannot properly adapt shift timing and line pressure for temperature. This increases wear and may allow overheating during heavy loads. Schedule diagnosis soon, especially if towing or driving in hot climates.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0711 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission
Difficulty
Type
Generic (SAE)
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