Transmission · Powertrain · generic (SAE-defined)
P0710: Transmission Fluid Temperature Sensor "A" Circuit
P0710 means the transmission computer detected an electrical problem in the transmission fluid temperature (TFT) sensor circuit.
Standard title per SAE J2012 / ISO 15031-6 · Updated 2026-11-07 · By CarWhere Research
How P0710 sets
The transmission fluid temperature (TFT) sensor is a thermistor whose resistance changes with fluid temperature. The transmission control module (TCM) or powertrain control module (PCM) reads the resulting voltage and uses it to adjust shift pressure, timing and torque converter clutch lockup. When the circuit reading is missing, erratic or outside its electrical range, the module sets P0710 and usually substitutes a default temperature.
Common causes of P0710
Roughly most likely first; the actual cause depends on the vehicle and needs testing to confirm.
- Failed transmission fluid temperature sensor
- Damaged internal transmission harness
- Corroded or loose transmission case connector
- Wiring open or short between the transmission and computer
- Contaminated fluid affecting an internal sensor or harness
- TCM or PCM fault
P0710 symptoms
- Check engine light on
- Harsh or delayed shifts, especially when cold
- Torque converter clutch not locking up
- Reduced fuel economy
- Transmission temperature gauge or display incorrect
How P0710 is diagnosed
- Record freeze frame data and any other transmission codes
- Compare the fluid temperature reading in live data with engine coolant temperature after a cold soak
- Check fluid level and condition
- Inspect the transmission connector for fluid wicking, corrosion or bent pins
- Measure sensor resistance against the manufacturer's temperature chart
- Check circuit wiring for opens and shorts between the sensor and the computer
Typical fixes for P0710
- Replace the transmission fluid temperature sensor
- Replace the internal harness or solenoid assembly that includes the sensor
- Repair the case connector or external wiring
- Service the transmission fluid if it is burnt or contaminated
Replace parts only after testing confirms the cause — a code names the circuit or condition that failed a check, not necessarily the faulty part. We don’t publish per-repair prices; for what households actually spend on upkeep, see car repair costs.
Related codes & warning lights
P0710 FAQ
What does code P0710 mean?
P0710 means the transmission computer detected an electrical problem in the transmission fluid temperature (TFT) sensor circuit. The standard definition is "Transmission Fluid Temperature Sensor "A" Circuit."
Can I drive with a P0710 code?
Usually yes in the short term, though shifting may feel firmer or the torque converter may not lock. Diagnose it within days, because the transmission can no longer reliably detect overheating.
Where is the fluid temperature sensor?
On many automatics it is inside the transmission, often part of the internal harness or solenoid pack, so replacement usually requires removing the transmission pan.
Why does my transmission shift harder with P0710?
Without a trustworthy temperature reading, the computer uses default values and often raises line pressure to protect the clutches, which makes shifts firmer.
Keep researching
More transmission codes
Sources
- SAE J2012 — Diagnostic Trouble Code Definitions (standard code titles)
- ISO 15031-6 — Road vehicles: communication between vehicle and external equipment for emissions-related diagnostics, Part 6: Diagnostic trouble code definitions
- U.S. EPA — Vehicle Emissions Inspection and Maintenance (I/M) programs
- U.S. EPA, 40 CFR 86.1806-17 — Federal onboard diagnostics requirements for light-duty vehicles
General information written by CarWhere Research, not a diagnosis of your vehicle. Manufacturers can add their own sub-definitions and test conditions; confirm with the factory service information for your year, make and model. Before paying for a repair, check NHTSA for open recalls and your warranty booklet: federal law requires an emissions warranty on major emission-control parts such as the catalytic converter and engine computer.