Fuel Level Reading Not Accurate
The fuel level sensor is reporting an unexpected value.
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 computer thinks there's either too much or too little fuel in the tank compared to what's actually there.
What the computer is actually seeing
The Engine Control Unit (ECU) expects the fuel level sensor to provide a reading between 0 to 5 volts: 0V indicates empty and 5V indicates full. If the voltage is outside this range, or fluctuates erratically, the code sets.
What a healthy reading looks like
Fuel level sensor voltage should be between 0V (empty) and 5V (full) under normal operation.
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 connector and wiring for damage or corrosion. Look for signs of shorts or breaks.
- 2Verify the fuel level sensor operation: unplug the sensor and measure the voltage on the connector with the key on; expect 0V (empty) if the tank is empty, and up to 5V (full) if the tank is full depending on actual fuel level.
- 3If the sensor reading is significantly off, replace the fuel level sensor and retest.
- 4If the new sensor reads accurately, check for ECU updates; if issues persist, check wiring continuity back to the ECU.
Common causes
- Faulty fuel level sensor
- Wiring issues in sensor circuit
- Faulty fuel gauge
- ECU software issue
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's safe to drive, but you may have inaccurate fuel level readings.
Will this code come back after clearing?
It may come back if the underlying issue isn't resolved, especially if it's a faulty sensor.
Why does this code pair with other fuel-related codes?
They all stem from issues in the same fuel system components, often hitting multiple sensors or connections.
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 →