Fuel Level Sensor Circuit Low
Indicates that the fuel level sensor circuit is sending a low signal to the ECM.
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What it means (plain English)
The fuel level sensor measures the amount of fuel in the tank, and if it reports too low of a signal, the computer thinks there's almost no fuel.
What the computer is actually seeing
The Electronic Control Module (ECM) expects a voltage signal from the fuel level sensor, typically between 0.5V (empty) to 4.5V (full). If it sees below 0.5V, it triggers this code.
What a healthy reading looks like
Normal voltage from the fuel level sensor should be between 0.5V to 4.5V, depending on the fuel level.
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 the fuel level in the tank to ensure it's not low. Decision: Is the fuel level adequate? If yes, proceed; if no, fill tank to normal level and recheck code.
- 22. Inspect the wiring and connectors at the fuel level sensor. Decision: Are the connections secure and undamaged? If yes, proceed; if no, repair connections and retest.
- 33. Measure the voltage at the fuel level sensor connector with a multimeter. Decision: Is the voltage within the expected range (0.5V to 4.5V)? If yes, proceed; if no, replace the fuel level sensor.
Common causes
- Faulty fuel level sensor
- Wiring issues or short circuits
- Bad fuel tank ground
- ECM fault
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may experience inaccurate fuel gauge readings.
Will this problem come back after clearing the code?
If the underlying issue is not fixed, the code is likely to return.
Why does this code pair with SPN 3195?
SPN 3195 is related to the same fuel level sensor but indicates a high signal condition.
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