P0710Transmission Fluid Temperature Sensor A Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The transmission fluid temperature sensor is an NTC thermistor whose resistance falls as the fluid warms; the module feeds it with 5 V through a resistor. A low signal therefore means very hot or a short to ground, a high signal very cold or an open circuit. P0710 is the general circuit code used when a manufacturer does not separate low and high. Subaru-based systems (Saab 9-2X) flag 0.1 V or less or 4.7 V or more, light the MIL after two consecutive trips and use 80 °C as substitute. Ford's 2023 diesels use P0710 alongside P0712/P0713 for open and short circuits, without MIL, after 5–12 s, substituting coolant temperature. GM uses only the split codes. With the substitute value the shift quality suffers: harsh shifts and a late converter clutch.
- What you may notice
- Harsh or late shifts
- Torque converter clutch applies late or not at all
- Check engine or transmission lamp depending on manufacturer
- Implausible fluid temperature in the scan tool
- Likely causes
- LikelyFluid temperature sensor faulty (often part of the internal harness or valve body)
- PossibleTransmission connector leaking or corroded, oil in the connector
- PossibleWire open or shorted
- RareTransmission or engine module faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.