Transmission Fluid Temperature (TFT) Sensor
Transmission fluid temperature sensor input out of range.
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What it means (plain English)
The transmission fluid temperature sensor is reading a temperature that's either too high or too low, which can affect shifting and transmission operation.
What the computer is actually seeing
The engine control unit (ECU) analyzes the transmission fluid temperature to adjust transmission performance. It expects a constant range indicating the fluid is within normal operating temperatures (typically around 70-100°C or 158-212°F).
What a healthy reading looks like
Transmission fluid should measure between 70-100°C (158-212°F) when operating normally, with sensor input typically between 0.5V (below range) and 4.5V (above range).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the transmission fluid level. Add fluid if it's low and recheck the sensor reading.
- 22. Inspect the wiring and connectors to the transmission fluid temperature sensor for any damage or corrosion.
- 33. With the ignition on, measure the voltage at the sensor connector. It should be between 0.5V and 4.5V. If out of range, replace the sensor.
- 44. If the sensor is working and the wiring is fine, inspect the transmission for internal damage or issues that could cause heat problems.
Common causes
- Faulty transmission fluid temperature sensor
- Wiring issues or connector problems
- Low transmission fluid level
- Internal transmission issues
- Corroded connectors or damaged wiring
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It might be drivable, but transmission performance could be affected, so fix it soon.
Will the code come back after clearing?
If there's an underlying issue, it will likely return after driving for a bit.
Why does this code pair with other transmission codes?
Common causes like wiring issues or low fluid can trigger multiple codes related to transmission performance.
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