Fuel Temperature Sensor
Indicates an issue with the fuel temperature sensor.
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What it means (plain English)
The fuel temperature sensor checks how hot the fuel is. If it’s too hot or cold, it can mess with the engine's performance and fuel delivery.
What the computer is actually seeing
The engine control module (ECM) sees a voltage signal from the fuel temperature sensor that tells it the current temperature of the fuel. Typically, this signal should range from 0.5 to 4.5 volts depending on the temperature.
What a healthy reading looks like
Normal temperature readings from the sensor are roughly between 30°C and 80°C (86°F and 176°F).
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. Ensure it’s sufficient and the quality is acceptable. Decision: Is fuel level adequate? Yes: Go to step 2; No: Add fuel, retest.
- 22. Inspect the wiring and connector to the fuel temperature sensor for damage or corrosion. Decision: Are they okay? Yes: Go to step 3; No: Repair/replace wiring or connector, then retest.
- 33. Test the voltage output of the fuel temperature sensor with a multimeter while the engine is running. Expected value is 0.5-4.5 volts. Decision: Is the voltage within range? Yes: Replace the fuel temperature sensor; No: Repair harness/ECM issues.
Common causes
- Faulty fuel temperature sensor
- Wiring issues or short circuits
- Corrosion in the connector
- Fuel leaks or improper fuel flow
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means it's best to fix soon, but you can drive it a limited distance if needed.
Will the code come back after fixing?
If all tests show normal values after repairs, it should not reappear.
Why does this code appear with others?
Often, related sensors can share wiring or engine conditions, leading to multiple codes.
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