Transmission Oil Temperature Sensor
Transmission oil temperature sensor signal is out of expected range.
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What it means (plain English)
The transmission oil temperature sensor measures how hot the transmission fluid is to ensure it operates within a safe range. If it measures too high or low, it can cause shifting issues and damage.
What the computer is actually seeing
The engine control unit (ECU) monitors the transmission oil temperature. If it sees temperatures above 220°F (104°C) or below -20°F (-29°C), it will trigger this fault code.
What a healthy reading looks like
Transmission oil should typically operate between 160°F (71°C) and 200°F (93°C) under normal conditions.
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 and condition. Ensure it's at the proper level and not burnt. If low, top it off and recheck for the code.
- 22. Inspect the wiring and connector at the transmission oil temperature sensor for damage or corrosion. Repair any issues found.
- 33. Use a scanner to read the actual transmission fluid temperature. Compare it to the expected values. If it shows outside the normal range, the sensor may be faulty.
- 44. If the sensor is faulty, replace it and clear the fault codes. Test drive and monitor for the code returning.
Common causes
- Faulty transmission oil temperature sensor
- Wiring issues (shorts, opens) in the sensor circuit
- Contaminated or low transmission fluid level
- ECU software error
Typical repair cost
$$
Related codes
Frequently asked questions
Can I continue driving with this code?
It's drivable but you should fix it soon to avoid potential transmission damage.
Will this code come back after repairs?
If the underlying issue is fixed, the code should not return.
Why does this code appear when I have other transmission issues?
Transmission issues can cause the temperature to fluctuate, which may trigger this code as a secondary concern.
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