Fuel Level Sensor Circuit Voltage High
The fuel level sensor circuit is reporting a voltage that is higher than the expected range.
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What it means (plain English)
The fuel level sensor is supposed to send a voltage signal to the computer that indicates how much fuel is in the tank. If this signal is too high, it may think the tank is full when it isn't.
What the computer is actually seeing
The computer expects a voltage in the range of 0.5 to 4.5 volts from the fuel level sensor when measured. If it sees a voltage above 4.5 volts, it triggers this code.
What a healthy reading looks like
0.5 to 4.5 volts from the fuel level sensor.
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 fuel level in the tank; ensure it is not full when testing the sensor.
- 22. Inspect wiring and connectors for signs of damage, corrosion, or loose connections; repair as necessary.
- 33. With the ignition on, using a multimeter, measure the voltage at the fuel level sensor connector. Is it above 4.5 volts?
- 4 - Yes: Go to step 4.
- 5 - No: Potentially a faulty sensor; replace the fuel level sensor and retest.
- 64. Check continuity of the signal wire and ground back to the ECM; are they good?
- 7 - Yes: Possible fault in the ECM; replace the ECM and retest.
- 8 - No: Repair wiring as necessary and retest.
Common causes
- Faulty fuel level sensor
- Wiring issues (short circuit)
- Corroded connector pins
- Faulty Engine Control Module (ECM)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s drivable, but you won't know how much fuel is in the tank accurately, so fill up as needed.
Will this code come back after I reset it?
If the underlying issue isn't fixed, yes, it will return.
Why is this code appearing with low fuel warnings?
It can read high volts even at low fuel levels due to sensor or wiring issues.
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