P0710 indicates a problem with the transmission fluid temperature (TFT) sensor electrical circuit. The powertrain or transmission control module detects a signal that is out of specification, intermittent, or missing from the sensor that reports transmission fluid temperature.
The sensor itself can drift out of calibration, short internally, or open, sending an implausible voltage or no signal to the control module.
Corroded, damaged, chafed, or loose terminals in the sensor harness can cause intermittent opens, shorts to ground or power, or high resistance in the TFT circuit.
Severely degraded, contaminated, or overheated fluid can push temperature readings to the edge of the normal range and may stress the sensor; it can also trigger related performance codes.
On units where the sensor is inside the transmission, faults in the internal harness, pass-through connector, or valve body can interrupt the signal path.
Rarely, the control module may misread a good signal due to an internal reference-voltage or input-circuit fault; this should only be considered after the sensor and wiring are ruled out.
Short local trips are usually possible, but avoid towing, heavy loads, or high-speed driving. The transmission may default to limp mode, and hidden overheating can occur if the temperature signal is unreliable.
No. P0710 is an electrical circuit fault; the repair is usually the sensor, wiring, or connector, not a transmission overhaul.
Usually not. A control module is one of the least likely causes. Most P0710 faults are resolved by replacing the sensor or repairing wiring. Only consider the module after the sensor, harness, and reference voltage have been thoroughly tested.
Low or degraded fluid can lead to overheating and abnormal temperature readings, but the code specifically flags the sensor circuit. Always check fluid level and condition first, then address the sensor or wiring if the circuit is faulty.