FUEL LEVEL SENSOR OUT OF RANGE
Fuel level sensor is reporting out of expected range.
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 in the tank is showing a fuel level that's unexpected, like saying the tank is empty when it's not.
What the computer is actually seeing
The Engine Control Module (ECM) sees a voltage or signal from the fuel level sensor that is outside the normal operating range, usually below 0.5V or above 4.5V.
What a healthy reading looks like
Normal operation should be between 0.5V (empty) and 4.5V (full) based on 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. Inspect wiring and connectors at the fuel level sensor for damage or corrosion. Decision: Good condition? If yes, go to step 2. If no, repair or replace wiring/connectors.
- 22. Test voltage at the fuel level sensor connector. Key values: should range from 0.5V (empty) to 4.5V (full). Decision: Voltage out of range? If yes, replace the fuel level sensor. If no, go to step 3.
- 33. Check ECM input by using a scan tool. Does it read real-time fuel level reasonably according to known fuel level? Decision: Accurate reading? If yes, check for possible software updates. If no, ECM could be faulty or misconfigured.
Common causes
- Faulty fuel level sensor
- Wiring issues (shorts or opens in the harness)
- Poor connection at the sensor or ECM
- Corroded connectors
- Damaged float mechanism in the tank
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity indicates it's drivable, but you'll have unreliable fuel readings which could lead to running out of fuel unexpectedly.
Will the code come back after clearing?
If the underlying issue isn't fixed, yes, the code is likely to return.
Why might this code appear with SPN 6259?
SPN 6259 represents an internal fault in the level sensor, often paired with SPN 6260 indicating it’s a symptom of a broader issue with the fuel level system.
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 →