Transmission Fluid Temperature Sensor Range/Performance Problem
There’s a problem with the transmission fluid temperature sensor's readings.
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 sensor that measures the temperature of the transmission fluid isn’t reporting correctly, meaning the computer can't tell if your transmission fluid is too hot or cold.
What the computer is actually seeing
The transmission control module (TCM) expects the fluid temperature sensor readings to be within a specific range (typically around 80-100°C for normal operation). When it sees a reading that’s too low or too high—or if it gets no signal—it triggers this fault.
What a healthy reading looks like
Normal transmission fluid temperature should be around 80-100°C; values outside of 20°C to 130°C will raise this code.
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 connector to the transmission fluid temperature sensor for damage or corrosion. Decision: If damaged, repair and retest; if fine, go to step 2.
- 22. Check the transmission fluid level and condition—make sure it’s clean and at the correct level. Decision: If low or dirty, top it up or replace it; if good, go to step 3.
- 33. Measure the voltage output of the transmission fluid temperature sensor with a multimeter. Expected: 0.5V to 4.5V scale. Decision: If outside this range, replace the sensor; if within range, go to step 4.
- 44. Using a scan tool, monitor the temperature readings while the vehicle is running. Expected: Should correlate to engine temperature. Decision: If readings are erratic or out of range, consider replacing the TCM.
Common causes
- Faulty transmission fluid temperature sensor
- Wiring or connector issues to the sensor
- Fluid contamination or incorrect fluid type
- Failing transmission control module (TCM)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be drivable for a short distance, but an overheating transmission can cause damage—address it soon.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will return.
Why does this code pair with other codes?
Transmission issues often affect multiple systems, so related codes can indicate compounded problems.
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 →