Fuel Level Sensor Circuit Low
The fuel level sensor signal is lower than expected.
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What it means (plain English)
The fuel level sensor is sending a signal to the engine control unit (ECU) that indicates the fuel level is lower than what is actually in the tank.
What the computer is actually seeing
The ECU expects a fuel level reading, typically between 5-150 ohms. If the signal drops below the expected threshold, it triggers a fault code.
What a healthy reading looks like
Fuel level sensors should report between 5-150 ohms based on fuel level; for a full tank, expect around 5 ohms, and for an empty tank, expect up to 150 ohms.
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. Verify fuel level in tank; if empty, fill and see if code clears.
- 22. Check wiring and connectors from the fuel level sensor to the ECM for corrosion or damage; repair as needed.
- 33. Using a multimeter, measure resistance at the fuel level sensor connector; it should range from 5-150 ohms depending on fuel level.
- 44. If sensor resistance is out of range, replace the fuel level sensor; if within range, check ECU for faults.
Common causes
- Faulty fuel level sensor
- Wiring or connector issues
- Faulty engine control unit (ECU)
- Ground circuit problems
- Liquid in connector
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but monitor fuel levels closely to avoid running out of fuel unexpectedly.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return.
Why do I see this code with SPN 1044?
SPN 1044 indicates an issue with the fuel tank, so both codes can represent issues in the fuel measurement system.
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