FUEL TEMPERATURE SENSOR
Fuel temperature sensor reading out of range.
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What it means (plain English)
The fuel temperature sensor is giving a temperature reading that's too high or too low for the engine's or fuel system's specs, which can affect performance and emissions.
What the computer is actually seeing
The engine control unit (ECU) receives a signal from the fuel temperature sensor indicating fuel temperatures that show deviations beyond the expected range.
What a healthy reading looks like
Normal fuel temperature should be between 50°F and 140°F (10°C and 60°C) during operation.
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 fuel level and fuel condition (clean, no contamination). Decision: If fuel is dirty or low, correct issue before proceeding.
- 22. Inspect the wiring and connectors related to the fuel temperature sensor for damage or corrosion. Decision: If damaged, repair or replace wiring/connectors and retest.
- 33. Use a scan tool to check the actual fuel temperature reading against the expected value. Decision: If it's out of range, continue to next step, otherwise, consider other issues.
- 44. Measure the resistance of the fuel temperature sensor (cold, it should have a specific resistance value). Decision: If resistance is off, replace the sensor.
- 55. If the sensor is replaced, clear the code and run the engine to see if the code reappears. Decision: If it does, further diagnose ECU issues.
Common causes
- Faulty fuel temperature sensor
- Wiring issues or connector problems
- Fuel contamination affecting sensor readings
- ECU calibration issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate, so it’s best to fix soon to avoid performance issues.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code sometimes pair with other codes?
Other codes may relate to fuel delivery system problems that can occur simultaneously.
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