Fuel Level Sensor Circuit High
The fuel level sensor signal is too high.
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What it means (plain English)
The fuel level sensor is sending a higher voltage than expected, indicating a full tank when it might not be.
What the computer is actually seeing
The Engine Control Module (ECM) sees a voltage from the fuel level sensor exceeding the maximum expected level, typically over 4.5 volts DC.
What a healthy reading looks like
Fuel level sensor output should range between 0.5 to 4.5 volts, with 0.5V indicating near empty and 4.5V indicating 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.
- 1Check fuel level in the tank; if it's full and the warning is present, proceed.
- 2Inspect the fuel level sensor wiring and connectors for damage or corrosion.
- 3Using a multimeter, verify the voltage output from the fuel level sensor; it should be between 0.5 and 4.5 volts.
- 4If voltage is above 4.5 volts, replace the fuel level sensor; if normal, check the ECM for updates or faults.
Common causes
- Faulty fuel level sensor
- Damaged wiring or connectors in the fuel level circuit
- Poor ground connection for the sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix soon since it can affect fuel gauging but the vehicle should still be drivable.
Will this code come back after clearing?
If the underlying issue is not resolved, yes, the code will likely return.
Why does this code appear with low fuel pressure?
Low fuel pressure may affect the sensor's reading indirectly if the sensor is not functioning properly or receiving accurate data.
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