Transmission Fluid Temperature (TFT) Sensor 1
Indicates abnormal transmission fluid temperature readings.
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What it means (plain English)
The Transmission Control Module (TCM) uses a sensor to monitor transmission fluid temperature. If it reads outside the normal range, it triggers the fault code, which can indicate overheating or sensor issues.
What the computer is actually seeing
The TCM expects the transmission fluid temperature to stay between 175°F to 220°F (80°C to 105°C) under normal operating conditions. If the readings go above 250°F (121°C) or below 20°F (-7°C), the code is triggered.
What a healthy reading looks like
Transmission fluid temperature should be between 175°F to 220°F (80°C to 105°C); anything outside this range can set the 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.
- 1Check transmission fluid level; ensure it's within specified range (usually marked on dipstick). If low, refill and retest.
- 2Inspect wiring and connections to the TFT sensor for damage or corrosion. Repair as needed.
- 3Use a scan tool to check the actual TFT readings. Compare with ambient conditions; if it shows unrealistic values, proceed to the next step.
- 4Replace the TFT sensor if wiring and fluid levels are good but readings are still out of range.
- 5Clear the code and take the vehicle for a test drive; if code returns, further diagnosis of transmission issues is required.
Common causes
- Faulty transmission fluid temperature sensor
- Wiring or connector issues
- Low transmission fluid level
- Overheating due to transmission failure
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code active?
It's drivable, but monitor for shifting issues or signs of overheating. Fix soon.
Will the code come back after I fix it?
If repairs are done correctly, it should not return.
Why might this fault code occur alongside others?
Related codes could indicate a systemic issue affecting transmission temperature readings, like fluid quality or overheating.
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