Fuel Level Sensor Circuit Fault
There’s an issue with the fuel level sensor 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 measures how much fuel is in the tank. If it can't give the right signal because of a wiring issue or sensor failure, the computer won’t know how much fuel is left.
What the computer is actually seeing
The engine control module (ECM) expects a voltage signal from the fuel level sensor between 0.5V (empty) and 4.5V (full). If the signal is below 0.1V or above 4.8V, the fault is triggered.
What a healthy reading looks like
Fuel level sensor should output a voltage between 0.5V and 4.5V corresponding to the fuel level in the tank.
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 connectors leading to the fuel level sensor for damage or corrosion. Decision: Are there any visible issues? Yes - repair wiring/connectors. No - proceed to next step.
- 22. Check the fuel level sensor resistance with a multimeter. Disconnect the connector and measure the resistance across the sensor terminals. Expected value: around 10 to 150 ohms. Decision: Is the resistance within range? Yes - replace the sensor. No - check the circuit for shorts or opens.
- 33. Measure the voltage signal from the fuel level sensor with the key in the ON position but engine off. Expected range is 0.5V to 4.5V. Decision: Is the output within this range? Yes - issue may be in ECM. No - replace the sensor.
Common causes
- Faulty fuel level sensor
- Corroded or damaged wiring to the sensor
- Poor connector contact
- Short circuit in the circuit
- Fuel tank contamination affecting sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe but the fuel gauge may not work correctly, making it hard to know how much fuel is left.
Will this code come back after clearing?
If the underlying issue isn’t fixed, it will likely return.
Could this code be related to another issue?
Yes, wiring issues can affect multiple sensors, so check for other codes too.
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 →