Fuel Level Input
Indicates an abnormal fuel level reading from the sensor.
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 telling the engine control module (ECM) that the fuel tank is either too full or nearly empty when it shouldn't be.
What the computer is actually seeing
The ECM expects the fuel level sensor to provide a voltage signal between 0.5V (empty) and 4.5V (full), indicating the actual fuel level in the tank.
What a healthy reading looks like
0.5V (empty), 4.5V (full), 2.5V (half 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 sensor wiring for breaks or corrosion, repair any issues found.
- 2Inspect the connector for corrosion or loose pins, clean and secure as necessary.
- 3Using a multimeter, measure voltage at the fuel level sensor connector with the key on (engine off). Expected value should be between 0.5V to 4.5V based on fuel level.
- 4If voltage is out of range, replace the fuel level sensor and retest.
- 5If voltage is within range, check the ECM for proper signals and any additional fault codes.
Common causes
- Faulty fuel level sensor
- Bad wiring or connectors to the sensor
- ECM calibration issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's drivable but you'll want to fix it soon to avoid running out of fuel unexpectedly.
Will this code come back after repairing?
If the repairs are done right and no other issues exist, it shouldn't return.
Why is this code linked to fuel consumption issues?
An inaccurate fuel level reading can cause the engine to run inefficiently, affecting fuel consumption.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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