What Does P0712 Mean?
The transmission fluid temperature sensor circuit is reporting a voltage that corresponds to an abnormally low resistance (indicating extremely high temperature) or the signal is shorted to ground. This is essentially a low-input version of the TFT circuit range/performance code. The TCM may command maximum cooling strategies or limit shift patterns.
Common Causes
30%
TFT sensor shorted internally, reading extremely low resistance
25%
Signal wire shorted to ground in the harness
20%
Transmission actually overheating due to cooling system failure
15%
Corroded or water-damaged connector shorting signal to ground
10%
Low or contaminated transmission fluid causing true overheat condition
Diagnostic Steps
1
Check the live data TFT reading. If it shows an unrealistically high temperature (e.g., 300°F+) on a cold engine, the sensor or circuit is at fault. If the reading is in a plausible but high range (250-280°F), the transmission may actually be overheating.
2
With engine cold, disconnect the TFT sensor and measure its resistance. Should read 2,000-3,000 ohms at room temp. A very low reading (under 100 ohms) confirms an internally shorted sensor.
3
With the sensor disconnected, check if the scan tool reading drops to a very cold value (indicating the TCM sees an open circuit). If it stays hot, the signal wire is shorted to ground.
4
Inspect the wiring from the sensor to TCM for damage, especially where it passes near hot exhaust components or sharp edges. Look for melted insulation.
5
Verify the transmission cooling system is functioning — check cooler line flow, auxiliary fan operation, and cooler for restrictions.
Estimated Repair Cost
$80 - $400
Parts + labor, varies by vehicle and location
The transmission fluid temperature sensor circuit is reporting a voltage that corresponds to an abnormally low resistance (indicating extremely high temperature) or the signal is shorted to ground. This is essentially a low-input version of the TFT circuit range/performance code. The TCM may command...
The most common cause of P0712 (Transmission Fluid Temperature Sensor Circuit Range/Performance) is: TFT sensor shorted internally, reading extremely low resistance
Typical repair costs for P0712 range from $80 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
If the transmission is truly overheating, stop driving immediately to prevent catastrophic damage. If it is a sensor fault only, short-term driving is acceptable but the TCM may limit performance. Confirm whether the temperature reading is genuine before continuing to drive.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0712 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission
Difficulty
Type
Generic (SAE)
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