Fuel Level Sensor Circuit High
The fuel level sensor circuit is reporting a high value.
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What it means (plain English)
The fuel level sender, which measures how much fuel is in the tank, is showing a level that's too high for the computer to handle, which could be due to a faulty sensor or a wiring issue.
What the computer is actually seeing
The computer monitors the fuel level sensor input, which should be between 0 to 5 volts. A value above 5 volts indicates an issue, signaling a problem with the sensor or its circuit.
What a healthy reading looks like
Fuel level should read 0 volts (empty) to 5 volts (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. Inspect the wiring and connectors for damage or corrosion. Repair any issues found.
- 22. Measure the voltage at the fuel level sensor connector with the ignition on but engine off. Expected voltage should be within 0-5V range.
- 33. If the voltage is above 5V, disconnect the sensor and measure the voltage again. If it drops to normal levels, the sensor is likely faulty.
- 44. If the voltage remains high with the sensor disconnected, check for a short to power in the harness.
- 55. If all checks are normal but the code persists, consider replacing the fuel level sensor.
Common causes
- Faulty fuel level sensor
- Damaged wiring or connectors in the sensor circuit
- Short to power causing high voltage reading
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address it soon as it can affect fuel level readings, which may lead to running out of fuel unexpectedly.
Will this code come back after clearing?
If the underlying issue isn’t fixed, yes, it will return.
Why does this code pair with other SPN codes?
Similar sensors communicate with the ECM and share circuits, so issues can reflect across multiple codes.
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