Fuel Level Signal Abnormality
Indicates an issue with the fuel level sensor or circuit.
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 either sending incorrect readings to the engine control module or there’s a problem in the wiring that communicates this data.
What the computer is actually seeing
The engine control module (ECM) expects a fuel level voltage reading that varies between 0.5V (empty) and 4.5V (full). If it sees values outside this range or static values, it triggers this code.
What a healthy reading looks like
Expected fuel level input is between 0.5V and 4.5V; common readings for empty and full are approximately 0.5V and 4.5V respectively.
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. Inspect the wiring and connections to the fuel level sensor for damage or corrosion.
- 2 - If the wiring is damaged, repair or replace.
- 32. Measure the voltage at the fuel level sensor plug while the ignition is on. It should fluctuate between 0.5V and 4.5V as the tank is filled and emptied.
- 4 - If not, replace the fuel level sensor.
- 53. Check for a proper ground at the fuel level sensor; it should be near 0V when measured to battery negative.
- 6 - If the ground is faulty, repair the ground connection.
- 74. If all wiring and sensor are good, consider testing or replacing the ECM.
Common causes
- Faulty fuel level sensor
- Corroded wiring connections
- Short or open circuit in fuel level wiring
- Faulty ECM
- Improper fuel tank grounding
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code active?
Yes, but you may not be able to accurately determine how much fuel you have, which could lead to running out of fuel unexpectedly.
Will this code come back after I clear it?
If the underlying issue isn't fixed, it likely will return.
Why does this code sometimes pair with other codes?
Issues in the fuel level reading can affect other fuel-related sensors and systems, which may trigger additional error codes.
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