P0710: How to Diagnose & Fix — Transmission Fluid Temperature Sensor Circuit Malfunction
2 vehicles · 2 makes · $50-$3,000 repair
How to diagnose and fix P0710: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Ford E-Series · 2000–2014
E-Series vans use rubber transmission cooler hose sections that connect the steel lines to the radiator-mounted transmission cooler. These rubber sections harden, crack, and leak transmission fluid. The leak is often slow enough that the fluid level drops gradually, causing the transmission to slip before the leak is noticed. The rubber hoses are routed near the exhaust manifold where heat accelerates degradation.
Common Symptoms
- Reddish fluid dripping from radiator area
- Transmission slipping or delayed engagement
- Burning transmission fluid smell
- Low transmission fluid level
- Transmission overheating warning
How to Fix
Replace the rubber transmission cooler line sections with silicone or braided stainless steel upgraded hoses. Use quality hose clamps rated for transmission fluid pressure. Check fluid level after repair and top off with Mercon V (or Mercon LV for 2009+). Install an auxiliary external transmission cooler if the van is used for towing.
Sources for this issue (1)
Nissan NV · 2012–2021
The Nissan NV 1500/2500/3500 models use a 5-speed automatic transmission (RE5R05A) that overheats under heavy load conditions — particularly when the van is loaded to its GVWR in hot weather. The factory transmission cooler is marginally sized for commercial use. Overheating degrades the ATF, causing the torque converter clutch to shudder and the shift quality to deteriorate. The NV 3500 passenger van with full seating capacity is especially prone.
Common Symptoms
- Transmission overheating warning when fully loaded
- Harsh or delayed shifting after extended highway driving
- Torque converter shudder at 40-50 mph
- Transmission fluid dark or burnt smell
- Reduced tow rating performance
How to Fix
Install an auxiliary transmission cooler with a thermostat — this is the most important modification for any NV used commercially. Change ATF every 30,000 miles with Nissan Matic S fluid. If shudder is already present, a fluid flush with new ATF can resolve early-stage torque converter clutch issues. A transmission temperature gauge helps monitor temperatures during heavy loads.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Nissan Matic S automatic transmission fluid 999MP-MAT00S
Verify VIN, transmission code, quantity and temperature-based level procedure.
- Derale Series 8000 universal plate-fin transmission cooler kit D13502
A qualified installer must confirm space, capacity, adapters, hose pressure/temperature rating, series routing and any separate thermostat before purchase.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- TipChange ATF every 30,000 miles with Nissan Matic S — the factory "lifetime fill" recommendation is for passenger car duty, not commercial van use
- WarningAn auxiliary transmission cooler should be considered mandatory equipment for any NV used for delivery, passenger transport, or towing
Find P0710 by make
Browse every documented model and issue for your make.
P0710 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0710 mean?
P0710 stands for "Transmission Fluid Temperature Sensor Circuit Malfunction." This transmission code indicates a malfunction in the transmission fluid temperature (TFT) sensor circuit. That sensor tells the computer how hot the transmission fluid is so it can adjust shift timing, torque-converter lockup, and line pressure — and protect the transmission from overheating. The code sets when the temperature signal is implausible, out of range, or the circuit is open or shorted. Because the computer relies on this reading, you may notice harsh or delayed shifts, no torque-converter lockup, or the transmission defaulting to a protective strategy.
What are the most common causes of P0710?
The most common causes of P0710 are: Faulty transmission fluid temperature sensor, Open, shorted, or corroded sensor wiring, Damaged or loose connector (often internal to the transmission), Low or contaminated transmission fluid, Internal wiring/harness fault inside the transmission, Poor ground or reference circuit, Faulty transmission control module (TCM) — rare. The specific cause varies by vehicle.
How much does it cost to fix P0710?
Repair costs for P0710 range from $50 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P0710?
Au7o has documented P0710 across 2 vehicle models from 2 manufacturers: Ford, Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.