Fuel Level Sensor Circuit Failure
Indicates 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 fuel level sensor in the tank is having trouble sending the correct amount of fuel information to the engine computer, which can lead to inaccurate fuel readings.
What the computer is actually seeing
The engine control unit (ECU) is receiving inconsistencies from the fuel level sensor circuit, possibly reading values outside the expected range or detecting an open circuit or short.
What a healthy reading looks like
The fuel level sensor should vary between 0 (empty) to approximately 5 volts (full) depending on 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. Check the fuel level sensor connector for corrosion or looseness; repair if found.
- 22. Measure voltage at the fuel level sensor connector while the ignition is on; expected voltage should be 5 volts. If no voltage, check wiring back to the ECM.
- 33. Measure resistance of the fuel level sensor; at empty, it should be near 0 ohms, and at full, it should be around 90-130 ohms depending on the specific sensor.
- 44. If other components are ruled out, replace the fuel level sensor and recheck the circuit for proper operation.
Common causes
- Faulty fuel level sensor
- Open circuit in wiring
- Short circuit in wiring
- Dirty fuel tank
- Faulty engine control module (ECM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but it may affect fuel management and lead to incorrect fuel readings.
Will this code come back after clearing?
If the fault is still present in the sensor or wiring, yes, it will return.
Why does this code sometimes pair with other SPN codes?
Multiple codes can point to related issues in fuel system integrity, since components often share wiring or signals.
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