Fuel Level Sensor Circuit High
The fuel level sensor is reporting a high voltage signal.
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What it means (plain English)
The computer thinks the fuel tank is fuller than it actually is because the sensor is sending a high voltage signal, usually over 4.5 volts.
What the computer is actually seeing
The ECU reads the fuel level sensor input. It expects a voltage between 0.5V (empty) to 4.5V (full), but it sees a voltage above 4.5V, triggering the code.
What a healthy reading looks like
Fuel level sensor voltage should range between 0.5V and 4.5V; anything above 4.5V sets the code.
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 of the fuel level sensor for damage or corrosion.
- 22. Measure the voltage at the fuel level sensor connector with the ignition on but engine off. If voltage is above 4.5V, go to step 3; if normal, suspect a faulty sensor.
- 33. Disconnect the fuel level sensor and check for proper ground at the connector. If not present, repair the ground; retest the system.
- 44. If the ground is good, replace the fuel level sensor; clear the code and test drive to confirm repair.
Common causes
- Corroded or damaged wiring
- Faulty fuel level sensor
- Bad engine control unit (ECU)
- Incorrectly installed aftermarket parts
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you'll have inaccurate fuel level readings until fixed.
Will this code come back after clearing?
It may if the underlying issue isn't resolved.
Why does this code sometimes pair with low fuel pressure?
A faulty fuel level sensor can cause a false high reading, impacting fuel system pressure readings.
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