Engine Fuel Temperature Sensor 1
Fuel temperature sensor is reading out of expected range.
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What it means (plain English)
The fuel temperature sensor sends the engine computer information about how hot the fuel is. This helps the system adjust for optimal performance. If the sensor fails or reads incorrectly, the engine may not run efficiently.
What the computer is actually seeing
The engine control module (ECM) expects fuel temperature readings between 0°C and 105°C (32°F to 221°F). Out-of-range readings can signal an issue.
What a healthy reading looks like
Nominal voltage from the sensor should be between 0.5V (cold) and 4.5V (hot).
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 wiring and connectors to the fuel temperature sensor for damage or corrosion. Repair as needed.
- 22. Measure the sensor's output voltage with a multimeter while the engine is running. Expect between 0.5V and 4.5V based on fuel temperature.
- 33. If voltage is outside of expected values, replace the fuel temperature sensor and retest.
- 44. If the sensor voltage is normal, inspect the ECM for faults or software updates.
Common causes
- Faulty fuel temperature sensor
- Wiring issues (short/open circuits)
- Poor connections at the sensor
- Coolant leaks affecting sensor readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s generally drivable, but fuel efficiency may be affected.
Will the code come back after reset?
If the underlying issue isn't fixed, yes, it will likely reappear.
Why does this code pair with fuel pressure codes?
Issues with fuel temperature can affect fuel viscosity, impacting pressure.
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