This code indicates the transmission fluid temperature (TFT) sensor circuit is providing an erratic, unstable, or on-and-off signal to the transmission or powertrain control module. Because shift strategy, line pressure, and torque converter lockup depend on accurate fluid temperature data, an intermittent signal can cause harsh shifting or limp-mode operation.
The sensor’s internal element or circuitry develops an intermittent open or short, causing the voltage signal to randomly drop out or spike while the vehicle is operating.
Chafed insulation, moisture intrusion into connectors, or backed-out pins disrupt continuity between the sensor and the control module, especially in areas exposed to heat or road spray.
Poor terminal fit at the sensor plug or the control module harness allows the circuit to open intermittently due to vibration, thermal expansion, or movement of the wiring harness.
The signal wire occasionally contacts ground or reference voltage wires due to damaged insulation, creating temporary voltage fluctuations that trigger the intermittent fault code.
Internal failure of the analog-to-digital converter or input buffer inside the module is rare, but can cause erratic interpretation of an otherwise stable sensor signal.
The definition is universal; the diagnostics are engine-specific. Open your vehicle for the codes documented for it:
Short trips are possible, but the transmission may default to limp mode with harsh shifting and reduced power. Continued driving risks overheating damage if the actual fluid temperature is high but the sensor signal is lost.
Yes. P0712 indicates a consistently low input signal, and P0713 indicates a consistently high input. P0714 specifically means the signal is erratic, unstable, or cutting in and out intermittently.
Almost never. This code is almost always caused by a failing sensor or wiring issue. The control module should only be considered after thorough testing confirms the sensor, connectors, and circuits are functioning correctly.
It is typically mounted on the valve body inside the transmission fluid pan, or threaded into the transmission case. Some designs integrate the sensor within the range sensor or solenoid pack assembly.