Transmission Temperature Sensor Failure
The transmission temperature sensor is reading incorrectly.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer thinks the transmission fluid is too hot or cold, but the sensor isn't sending the right signals.
What the computer is actually seeing
The transmission control module is receiving voltage readings from the temperature sensor that fall outside the expected range—usually below 0.5V or above 4.5V.
What a healthy reading looks like
Normal transmission fluid temperature should be between 160°F and 220°F (70°C to 104°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. Inspect the wiring and connectors to the transmission temperature sensor for damage or corrosion. Decision Point: If damaged, repair or replace wiring.
- 22. Test the resistance of the transmission temperature sensor. It should show a resistance value consistent with temperature. At 200°F, it should read around 1,000 ohms. Decision Point: If out of spec, replace the sensor.
- 33. Check the transmission fluid level and condition. Decision Point: Low fluid level or burnt fluid may point to a different issue needing attention.
- 44. Use a scan tool to check for any other active fault codes and freeze frame data. Decision Point: If related codes exist, address those issues first.
Common causes
- Faulty transmission temperature sensor
- Wiring issues or damaged connectors
- Corroded terminal connections
- Faulty ECM/TCM software
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive my vehicle with this code?
It's not recommended; the vehicle may experience shifting issues or overheating of the transmission.
Will this problem come back after fixing?
If you address the underlying issues correctly and replace the faulty sensor, it shouldn't return.
What else can trigger this code?
Extreme temperatures or a failing engine control module may also contribute to the fault.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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