P0711 on Cadillac: How to Diagnose & Fix
Transmission Fluid Temperature Sensor Circuit Range/Performance
1 Cadillac model · 1 documented issue · 1 critical · $300-$5,500 repair
P0711 on Cadillac by model: symptoms, diagnosis and fix
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.
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Sources for this issue (2)
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 on a Cadillac?
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. On Cadillac it is documented across 1 model: CT6.
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 on a Cadillac?
Published repair estimates on Cadillac range from $300 to $5,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0711 on a different make?
View P0711 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.