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DTC codes / P07xx · Transmission / P0711

P0711Transmission Fluid Temperature Sensor 'A' Circuit Range/Performance

P0711 means the transmission control module (TCM) has detected that the transmission fluid temperature sensor's signal is outside the expected range or not changing as the fluid warms up. The computer compares the sensor reading against a model of what the temperature should be after a certain driving time and flags the code when the two do not agree.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaTransmission

Symptoms you may notice

  • Often no symptoms besides the warning light, especially if the fault is intermittent
  • Harsh or delayed shifting when the transmission is cold because the TCM substitutes a default temperature
  • Torque converter clutch may not engage or may engage roughly
  • Transmission may stay in a single gear or enter limp mode in some vehicles
  • Poor fuel economy or unusual shift feel during the first few minutes of driving

Common causes, most likely first

  1. Faulty transmission fluid temperature sensor (TFT sensor) inside the transmission
  2. Damaged or corroded wiring or connector at the sensor or TCM
  3. Low or contaminated transmission fluid affecting heat transfer and sensor response
  4. Sticking or failed thermostat in the transmission cooler circuit (on vehicles so equipped)
  5. TCM software calibration issue or internal TCM fault
  6. Sensor installed incorrectly or wrong sensor type after a prior repair

How to diagnose and fix it

  1. Scan all modules and record freeze-frame data for P0711, noting the reported fluid temperature and engine coolant temperature at the time of the fault
  2. Check transmission fluid level and condition; top off or service fluid if it is low or burnt
  3. Inspect the TFT sensor connector and harness for corrosion, chafing, or loose pins, and wiggle-test while watching live data
  4. Compare the TFT sensor reading to a known-good value after a cold soak; the reading should match ambient temperature within a few degrees
  5. Back-probe the sensor signal and ground circuits at the TCM and measure resistance or voltage against the manufacturer's temperature chart
  6. If the sensor is internal, remove the pan or valve body as required and replace the TFT sensor, then clear codes and verify the reading changes smoothly during a road test
  7. If wiring and sensor check out, check for TCM software updates or diagnose the TCM itself before condemning it

What the fluid temperature sensor is really telling you

  • A common miss is assuming the sensor is bad when the real problem is low fluid or a restricted cooler that lets the fluid heat up faster than the TCM model expects.
  • On many vehicles the TFT sensor is part of the valve body harness or solenoids, so a single bad wire in that assembly can set P0711 without any sensor fault at all.
  • The code can be set by a cold-start logic check: if the sensor does not read close to ambient temperature after an overnight soak, the TCM flags the range fault even though the sensor works fine when warm.
  • After replacing the sensor or fluid, the TCM may need a relearn or adaptation reset before the code stays cleared, and some vehicles will not clear it until a full warm-up cycle is completed.
  • A failing engine coolant temperature sensor can indirectly cause P0711 on vehicles that use coolant temperature to model transmission warm-up, so check for related codes before replacing transmission parts.

Can I keep driving with P0711?

You can usually drive the vehicle to a shop, but avoid heavy towing or aggressive driving because the transmission may be using a default temperature and shift harshly. If the transmission enters limp mode or slips, stop driving and have it towed.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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