Transmission Fluid Temperature Sensor
Transmission fluid temperature sensor reading is out of range.
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What it means (plain English)
The transmission fluid temperature sensor monitors how hot the fluid is. If it gets too hot or too cold, it can throw a code because it might affect how the transmission performs.
What the computer is actually seeing
The engine control module (ECM) tracks the voltage signal from the transmission fluid temperature sensor. Normally, it should see voltage levels that correlate to fluid temperatures—such as 0.5V at 32°F (0°C) and rising to about 4.5V at 248°F (120°C).
What a healthy reading looks like
Expected voltage should range from 0.5V to 4.5V corresponding with fluid temperatures of 32°F (0°C) to 248°F (120°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 wiring and connectors for the transmission fluid temperature sensor. Look for damaged insulation, corrosion, or loose connections.
- 22. Measure the voltage at the sensor connector with the key on and engine off. You should see a voltage in the expected range: 0.5V to 4.5V. If not, there's likely a wiring issue.
- 33. With the engine running, get the transmission fluid hot enough (below 248°F/120°C) and check the sensor reading again. If the reading is still out of range, replace the sensor.
- 44. If replacing the sensor doesn't fix it, check the ECM for faults. Use a scan tool to check for any additional trouble codes that may point to a malfunction or miscommunication.
Common causes
- Faulty transmission fluid temperature sensor
- Wiring issues such as shorts or open circuits
- Bad ECM/PCM processing of temperature readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate; you can drive it but should fix it soon to avoid transmission issues.
Will the code come back after resetting?
Yes, if the cause isn't fixed, the code will reappear.
Why does this code show up with SPN 5461 or 5462?
These codes often indicate issues related to transmission temperature readings, so they can appear together when there's a fault.
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