Fuel Level Sensor Performance
Indicates an issue with the fuel level sensor's accuracy.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The fuel level sensor is not providing the right signal to the computer; it might read too high or too low.
What the computer is actually seeing
The engine control module (ECM) expects a fuel level signal that ranges between 0 to 5 volts, where 0 volts indicates empty and 5 volts indicates full. If the signal stays at a constant value or goes outside this range, the ECM sets this code.
What a healthy reading looks like
0-5 volts signal from the fuel level sensor; typically around 1-2 volts when the tank is low and 4-5 volts when the tank is full.
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.
- 1Check the fuel level in the tank; should be checked visually if low or drained.
- 2Inspect wiring and connectors between the fuel level sensor and the ECM for damage or corrosion.
- 3Using a scan tool, monitor fuel level sensor voltage during operation; should fluctuate within the expected range of 0-5 volts.
- 4If voltage is stagnant or incorrect, replace the fuel level sensor and retest.
- 5If the sensor is replaced and the issue persists, diagnose the wiring and ECM for faults.
Common causes
- Faulty fuel level sensor
- Wiring issues or connectors corrosion
- Fuel sender unit problems
- ECM software glitches
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Can I drive with this code active?
Yes, but be cautious of how much fuel is in the tank; rely on the gauge may lead to running out of fuel.
Will this code return after clearing it?
It can return if the underlying issue (like a faulty sensor) is not fixed.
Why does this code pair with code SPN 3462?
Both codes deal with the fuel level sensor circuit but may indicate different failure modes or calibration issues.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →