P0713Transmission Fluid Temperature Sensor A Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The transmission fluid temperature sensor is an NTC thermistor whose resistance falls as the fluid warms; the module feeds it with 5 V through a resistor. A low signal therefore means very hot or a short to ground, a high signal very cold or an open circuit. P0713 means the signal is too high – the sensor reads extremely cold, or the circuit is open or shorted to positive. GM's 2025 modules flag above 284 kΩ for 5 of 6 s after two trips; the 2007 Allison 1000 −45 °C or below for 2.5 s; Saab's AF40 below −43 °C; Ford above 4.6 V for 5–12 s without MIL. Many require prior running time or a warm engine so a genuine −40 °C cold start does not count (Allison: coolant above 20 °C; Saab: over 10 minutes of driving). The transmission then stays in its cold strategy: open converter clutch, late upshifts.
- What you may notice
- Fluid temperature shown around −40 °C
- Converter clutch stays open, late upshifts
- Higher fuel consumption
- Check engine or transmission lamp depending on manufacturer
- Likely causes
- LikelyTransmission connector loose or corroded, wire open
- PossibleSensor open internally
- RareSignal wire shorted to positive
- RareControl module faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.