P0711: How to Diagnose & Fix — Transmission Fluid Temperature Sensor Circuit Range/Performance
4 vehicles · 3 makes · $150-$5,500 repair
How to diagnose and fix P0711: 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 Transit Connect · 2019–2023
The 2019-2023 Ford Transit Connect equipped with the 8F35 8-speed automatic transmission experiences transmission shuddering, harsh engagements, slipping, and premature failure. Ford issued Technical Service Bulletin 22-2281 (since superseded by 24-2092 and 25-2550) for 2019-2022 Transit Connect vehicles built on or before July 1, 2022 with the 8F35 transmission, addressing slipping, harsh engagement and clutch DTCs caused by worn needle bearings in the output planet carrier assembly. FordTransitUSAForum.com documents a 2019 Transit Connect XL 8F35 transmission failure at the 75,000 mile mark. Eng-Tips.com engineering forums discuss the inherent shudder issue in the 8F35 torque converter clutch. Earlier Transit Connect models with the 6F35 transmission also had recall campaigns (2013-2021 models). The transmission issues are exacerbated by commercial use patterns - frequent stops, loaded cargo, and city driving accelerate wear on the torque converter clutch and internal clutch packs.
Common Symptoms
- Shuddering during light acceleration at 25-45 mph
- Harsh or jerky gear shifts
- Delayed engagement from Park to Drive
- Transmission slipping under load
- Check engine light with transmission codes
- Transmission warning message on dashboard
- Grinding or whining noise from transmission
- Vehicle hesitates or surges at low speed
How to Fix
First step: check for TSB coverage and have the dealer perform a transmission fluid change with genuine Motorcraft Mercon ULV fluid and a TCM software recalibration. For 2019-2022 Transit Connect built on or before 07/01/2022, Ford TSB 25-2550 addresses 8F35 slipping and harsh engagement by replacing the output planetary assembly. If shudder persists after fluid change and reprogram, the torque converter may need replacement ($800-1,500). Complete transmission replacement for internal failure runs $3,000-4,500. The powertrain warranty (5yr/60k miles) should cover this on newer vehicles.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (2)
GMC Yukon XL · 2007–2016
GMT900 and early K2XX Yukon XL models with 6L80/6L90 transmissions commonly develop leaks at the transmission cooler line crimps or quick-connect fittings. Owners report red fluid spots, low transmission fluid, and in severe cases slipping or overheating if fluid loss is significant. This issue is widely documented in owner reports and GM service bulletins addressing cooler line seepage/connection concerns on full-size trucks/SUVs using these transmissions.
Common Symptoms
- Red transmission fluid spots under front of vehicle
- Burnt ATF smell after driving
- Transmission slipping or delayed engagement
- Transmission over-temp message (if severe)
How to Fix
Replace the leaking transmission cooler line(s) or fitting seals; many repairs involve replacing the entire line assembly rather than re-crimping. After repair, verify fluid level with the correct ATF (Dexron VI for 6L80/6L90) and check for overheating-related damage.
Sources for this issue (1)
Cadillac CT6 · 2016–2018
Powertrain complaints are the single largest NHTSA complaint category for the 2017 CT6. Owners of 2016-2018 cars report harsh or banging engagement between first and second gear, unpredictable shift quality, a long delay when moving from neutral or park into reverse, and occasional lurching or hesitation on tip-in. Some cars set transmission-controller codes. Unlike the TCC shudder, this is a shift-quality and control fault rather than a fluid-friction issue, and it has driven a meaningful share of CT6 lemon-law claims. On PHEV cars the same symptom set has a separate documented electrical root cause (see the transmission wiring-harness thermistor issue).
Common Symptoms
- Harsh or banging 1-2 upshift
- Delay engaging reverse from neutral or park
- Lurching, bucking or kicking on light throttle
- Delayed downshifts
- Transmission warning message
How to Fix
Scan the transmission and check the calibration first. Apply the TCM update and complete the specified adaptive procedure before condemning hard parts. Use the named Dexron HP fluid only for the service branch; valve-body or clutch parts require a confirmed unit and failure mode.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mobil 1 Synthetic LV ATF HP, part 124715, one quart$14
Dexron HP fluid named by the repair for the CT6 eight-speed service branch. Quantity depends on the exact service procedure; this does not substitute for a TCM update, valve-body diagnosis or machine exchange.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (2)
Ford F-150 · 2017–2023
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P0711 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 P0711 mean?
P0711 stands for "Transmission Fluid Temperature Sensor Circuit Range/Performance." P0711 means the transmission fluid temperature (TFT) sensor's signal is outside its expected range or not changing as the computer expects (range/performance). This sensor monitors how hot the transmission fluid is so the computer can adjust shift timing, torque converter lockup, and protect the transmission from overheating. A range/performance fault usually means the sensor is reading an implausible or 'stuck' value rather than being completely open or shorted. It can cause harsh or delayed shifts, no torque converter lockup, or the transmission defaulting to a protective mode.
What are the most common causes of P0711?
The most common causes of P0711 are: Faulty transmission fluid temperature sensor, Low, old, or contaminated transmission fluid, Wiring or connector problems in the sensor circuit, Internal transmission overheating or restriction, Sensor reading stuck or drifting out of range, Poor ground or reference voltage to the sensor, Faulty transmission control module (TCM/PCM). The specific cause varies by vehicle.
How much does it cost to fix P0711?
Repair costs for P0711 range from $150 to $5,500, depending on the vehicle and root cause.
Which vehicles are affected by P0711?
Au7o has documented P0711 across 4 vehicle models from 3 manufacturers: Cadillac, Ford, GMC.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.