Fuel Level Sensor Circuit High
The fuel level sensor is reporting a voltage that indicates the fuel level is higher than expected.
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What it means (plain English)
Inside the fuel tank, there's a sensor that measures how much fuel is left. When this sensor sends a voltage signal that’s too high (typically above 4.5 volts), the computer thinks the tank is fuller than it actually is. This can happen due to a shorted wire or a faulty sensor.
What the computer is actually seeing
The engine control module (ECM) expects the fuel level sensor output to be within 0.5 to 4.5 volts, corresponding to empty to full fuel levels. A reading above 4.5 volts signals 'high level' which raises this code.
What a healthy reading looks like
Fuel level should give a voltage signal ranging from 0.5V (empty) to 4.5V (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 wiring and connectors at the fuel level sensor for damage or corrosion. Are they in good condition?
- 22. Use a multimeter to test the voltage at the sensor connector while the key is on. Is it above 4.5 volts? If yes, proceed to step 3; if no, check wiring to the ECM.
- 33. Check for a short circuit along the wiring harness leading to the ECM. Do you find any shorts? If yes, repair the wiring; if no, replace the fuel level sensor.
Common causes
- Faulty fuel level sensor
- Shorted wiring in the sensor circuit
- Bad connector or corrosion
- ECM software issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's generally safe to drive, but keep an eye on fuel levels as the gauge may be inaccurate.
Will this code come back after I fix it?
If you correctly address the wiring or sensor issue, the code should not return.
Why does this code appear with other SPNs?
It often appears with related fuel level or sensor codes due to shared wiring or circuit faults.
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