Transmission Fluid Temperature Sensor
Transmission fluid temperature sensor signal out of range.
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What it means (plain English)
The computer is monitoring the transmission fluid temperature, and it's reporting a number that doesn't make sense; either it’s too high or too low compared to normal working conditions.
What the computer is actually seeing
The Transmission Control Module (TCM) is expecting a fluid temperature reading between 175°F (79°C) and 205°F (96°C). A signal below 50°F (10°C) or above 250°F (121°C) usually triggers this code.
What a healthy reading looks like
The typical transmission fluid temperature range is between 175°F to 205°F (79°C to 96°C).
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; top off if low.
- 22. Inspect the wiring and connectors to the transmission fluid temperature sensor for damage or corrosion.
- 33. Test the voltage at the sensor with the ignition on (engine off); expect around 5V.
- 44. If voltage is good, use a scanner to monitor the transmission fluid temperature; compare against live data to see if it fluctuates correctly with temperature changes.
- 55. If out of range, replace the transmission fluid temperature sensor and clear codes.
Common causes
- Faulty transmission fluid temperature sensor
- Wiring issues (shorts, opens, bad grounds)
- Low transmission fluid levels
- Faulty Transmission Control Module (TCM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but not recommended for long distances or heavy loads until resolved, as it could lead to transmission overheating.
Will this code come back after resetting?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code appear with other codes?
Transmission issues are often interconnected; one faulty sensor can lead to multiple codes appearing.
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