Transmission Fluid Temperature Sensor - Circuit Range/Performance Problem
This code indicates a problem with the transmission fluid temperature sensor's reading.
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 transmission fluid temperature sensor measures how hot the transmission fluid is. If it shows a reading that's way too low or too high, it can cause shifting problems or even put the transmission into limp mode to protect it.
What the computer is actually seeing
The computer expects to see the transmission fluid temperature around 160°F to 200°F (70°C to 93°C). If the voltage from the sensor is below 0.5V or above 4.5V when running, it triggers this fault code.
What a healthy reading looks like
Transmission fluid temperature should be between 160°F and 200°F (70°C to 93°C) under normal operating 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.
- 1Check the transmission fluid level; it should be within the recommended range.
- 2Inspect wiring and connectors for damage, corrosion, or loose connections.
- 3Using a scan tool, check the actual transmission fluid temperature reading during operation. Ensure it doesn't fall below 0.5V or exceed 4.5V at normal temps.
- 4If readings are erratic or out of range, replace the transmission fluid temperature sensor and retest.
- 5If the problem persists after replacing the sensor, check the transmission control module for faults.
Common causes
- Faulty transmission fluid temperature sensor
- Wiring issues or corrosion in the sensor circuit
- Low transmission fluid level
- Faulty transmission control module (TCM)
- Poor connection or damaged connector pins
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive long distances because it may cause shifting issues or overheating.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code is likely to return after some driving.
Why does this code sometimes pair with transmission slipping?
Incorrect readings from the fluid temperature sensor can cause the transmission to slip due to improper shifting.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →