Fuel Level Sensor - Abnormal Reading
The fuel level sensor is reporting an incorrect fuel level.
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 sending bad data to the engine computer, which could mean you might run out of fuel unexpectedly.
What the computer is actually seeing
The fuel level sensor provides a voltage signal that ranges from 0.5V (empty) to 4.5V (full). If the readings are outside this range, it triggers the code.
What a healthy reading looks like
0.5V-4.5V for fuel level; normal resistance should range from 0-100 ohms depending on the tank's design.
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 to confirm if the reading is realistic.
- 2Inspect wiring and connectors to the fuel level sensor for damage or corrosion.
- 3Measure the voltage at the fuel level sensor while turning the ignition on (should be between 0.5V and 4.5V). If out of range, suspect the sensor.
- 4If wiring and voltage are normal, check fuel sensor resistance (0-100 ohms should be expected). Replace sensor if resistance is off.
Common causes
- Faulty fuel level sensor
- Damaged wiring or connectors
- Corroded terminals
- Software issue in the engine control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but be cautious as you may run out of fuel unexpectedly.
Will this problem come back after repair?
If the right parts are replaced and connections are secured, it shouldn't come back.
Why does this code pair with SPN 231?
SPN 231 often indicates a short circuit in the fuel level sensor circuit, which can happen simultaneously.
Working a real vehicle right now?
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