Fuel Level Sensor Circuit High
The fuel level sensor circuit has reported a high signal voltage.
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What it means (plain English)
Inside the fuel tank, the sensor measures fuel level by sending a voltage signal to the engine control module (ECM). When the fuel level is high, the signal should be between 0.5V and 2.5V. A voltage higher than this indicates a problem, likely from a short or an improper reading.
What the computer is actually seeing
The ECM sees a voltage reading from the fuel level sensor that is above its normal range, typically exceeding 2.5V, signaling to the ECM that the tank is either overfilled or that there's a fault in the sensor circuit.
What a healthy reading looks like
Normal operation should see a voltage range of 0.5V (empty) to 2.5V (full).
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. Is it overfilled? If yes, adjust to normal levels and clear the code.
- 22. Inspect the wiring between the sensor and the ECM. Any visible damage? Fix any issues found.
- 33. Test the voltage at the sensor connector with the ignition on. Is the reading over 2.5V? If yes, continue to step 4; if normal, replace the sensor or check the ECM.
- 44. Test the fuel level sensor by measuring resistance across its terminals. Is it within the manufacturer's specifications (usually between 10-200 ohms for empty to full)? If no, replace the sensor.
Common causes
- Faulty fuel level sensor
- Wiring issue or short circuit
- Faulty ECM
- Incorrect fuel tank installation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable if the fuel level is normal, but be cautious of fuel gauge inaccuracies.
Will the code come back after repairs?
If the repairs are done correctly, the code should clear and not return.
Why did this code pair with others like SPN 2131?
These codes often appear together when there are issues with the fuel level sensor circuit.
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