FUEL TEMPERATURE SENSOR
Indicates an issue with the fuel temperature sensor in the system.
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What it means (plain English)
The fuel temperature sensor measures how hot the fuel is in the tank or line. If it's not working right, the engine might not run properly, since the computer uses this info for fuel adjustments.
What the computer is actually seeing
The engine control module (ECM) sees voltages from the fuel temperature sensor that should be between 0.5 and 4.5 volts, corresponding to temperatures from about -40 to 125 degrees Celsius. If it sees a voltage out of this range, an error is triggered.
What a healthy reading looks like
Expect fuel temperatures to read between 5°C and 85°C when running under normal conditions.
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 for any visible damage or corrosion on the sensor connector and wiring.
- 22. Measure the voltage at the sensor with the engine running. Expected voltage should be between 0.5V and 4.5V. If voltage is outside this range, proceed to step 3.
- 33. Disconnect the sensor and check the resistance. It should show continuity. If open, replace the sensor.
- 44. If voltage is within range but the problem persists, check the ECM for fault codes or issues related to the fuel temperature sensor.
Common causes
- Faulty fuel temperature sensor
- Wiring issues to the sensor
- Corrosion or poor connection at the sensor
- Fault in the ECM
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive long distances as it may affect fuel delivery and engine performance.
Will the code come back after I fix it?
If the underlying issue is resolved, the code should clear and not return.
Why does this code appear alongside SPN 4092?
SPN 4092 relates to the fuel level sensor, which works alongside the fuel temperature sensor, thus they often trigger together.
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