Fuel Level Sensor Circuit Failure
There’s a problem 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 system is reading an incorrect fuel level, usually because the sensor can't send the right signal due to a wiring issue or a bad sensor.
What the computer is actually seeing
The Electronic Control Unit (ECU) expects the fuel level sensor to send a voltage signal between 0.5V (empty) and 4.5V (full), but it's either seeing no signal or an out-of-range value.
What a healthy reading looks like
Fuel level sensor voltage should typically range from 0.5V to 4.5V, depending on the fuel level; check for a stable signal during tests.
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. Start with a visual inspection of the fuel level sensor wiring and connectors. Look for frayed wires or corrosion.
- 22. Check the fuel level sensor's resistance with a multimeter. Expect between 0 ohms (empty) to around 200 ohms (full) for a typical sensor.
- 33. Use a scan tool to monitor the fuel level sensor voltage while the vehicle is running. Does it fall between 0.5V and 4.5V? If yes, the sensor is likely fine. If no, move to step 4.
- 44. Perform a continuity test from the fuel level sensor to the ECU. Any open circuit indicates a wiring issue that needs fixing.
- 55. If the wiring checks out, replace the fuel level sensor. Ensure that you clear any codes and test drive afterward to confirm.
Common causes
- Damaged wiring or connectors in the fuel level sensor circuit
- Faulty fuel level sensor
- Short or open circuit in the fuel sender unit
- Corrosion at the sensor or ECU connector
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may have an inaccurate fuel reading, so keep an eye on the gauge.
Will the code come back after clearing?
If the underlying issue isn't fixed, like a bad sensor or wiring, yes, it will likely return.
Why does this code pair with other SPNs?
It often pairs with related fuel system codes that indicate other issues, like fuel quality or additional sensor faults.
Working a real vehicle right now?
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