Fuel Level Sensor Circuit Voltage High
The fuel level sensor circuit is reporting a voltage higher than expected.
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What it means (plain English)
The fuel level sensor is designed to send a signal that indicates how much fuel is in the tank. If it's sending too high of a voltage, it might think there's more fuel than there actually is, which can affect your fuel gauge reading.
What the computer is actually seeing
The engine control module (ECM) is monitoring the voltage signal from the fuel level sensor, which should typically read between 0.5 and 4.5 volts depending on the fuel level. A voltage above this range (like 5 volts or more) triggers the fault code.
What a healthy reading looks like
0.5 to 4.5 volts from the fuel level sensor under normal conditions.
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. **Visual Inspection**: Check the wiring and connectors for any visible damage or corrosion. Ensure the connections are tight and clean.
- 22. **Check Voltage**: Measure the voltage at the fuel level sensor connector with the ignition on (engine off). Verify voltage readings to ensure it is within 0.5 to 4.5 volts. If voltage is too high (over 4.5 volts), continue; if not, the sensor may be fine.
- 33. **Sensor Testing**: If the voltage is too high, disconnect the fuel level sensor and check if the voltage drops. If it does, the sensor is faulty and should be replaced.
- 44. **Wiring Check**: If the voltage remains high with the sensor disconnected, inspect the wiring for shorts to power sources or other components. Repair as necessary.
- 55. **ECM Check**: If wiring and sensor check out but the issue persists, scan the ECM for additional fault codes related to the fuel system or issues with the ECM itself.
Common causes
- Faulty fuel level sensor
- Damaged wiring or connectors
- Short circuit in the fuel level sensor circuit
- Faulty ECM
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be safe, but you might experience incorrect fuel gauge readings. Monitor your fuel levels manually.
Will this code come back after clearing?
If the underlying issue isn't fixed (like a faulty sensor or short circuit), the code will likely return.
Why does this code appear when the fuel gauge is normal?
A faulty sensor or wiring issue could cause the ECM to receive incorrect voltage readings, leading to this code, regardless of actual fuel levels.
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