Fuel Level Sensor Circuit High
The fuel level sensor reading is too high.
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What it means (plain English)
The computer thinks there's too much fuel in the tank, which can happen if the fuel level sensor is shorted or stuck.
What the computer is actually seeing
The fuel level sensor typically sends a voltage signal between 0.5V (empty) to 4.5V (full). If it detects a constant high voltage (above 4.5V), it triggers this code.
What a healthy reading looks like
Expected fuel level sensor voltage should range from 0.5V to 4.5V depending on fuel level.
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. Inspect the wiring and connectors to the fuel level sensor for corrosion or damage. If any issues are found, repair them.
- 22. Check the fuel level sensor output voltage with a multimeter. It should range from 0.5V to 4.5V. If it reads above 4.5V, the sensor is likely faulty.
- 33. If sensor voltage is acceptable, check the ECM inputs for signal processing issues. Use a scan tool to monitor fuel level readings during operation.
- 44. If all values are normal but the code persists, consider testing or replacing the ECM.
Common causes
- Faulty fuel level sensor
- Wiring issues or short circuits
- Corroded connectors
- Faulty engine control module (ECM)
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code?
Yes, but it’s advisable to fix it soon as it may affect fuel economy or trigger other issues.
Will it come back after clearing?
If the underlying issue isn't fixed, yes, it will reappear.
Why does this code sometimes pair with other SPN codes?
Multiple fault codes may indicate a broader issue with the fuel level system or related components.
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