Fuel Level Sensor Voltage Low
The fuel level sensor is reporting a low voltage level.
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What it means (plain English)
The fuel level sensor in the tank is not sending enough voltage back to the engine control module (ECM), indicating that the fuel level is low or the sensor is faulty. It usually operates within a range of 0-5 volts, typically aiming to see around 4 volts for a full tank and 0 volts for empty.
What the computer is actually seeing
The ECM sees a low voltage input from the fuel level sensor, typically below 1 volt when the tank has fuel, which should be higher according to the expected range.
What a healthy reading looks like
Normal operation sees values between 0.5 to 4.5 volts, with 0-1V indicating low fuel level, and 4-5V indicating a full 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.
- 1Check the fuel level in the tank; ensure there is sufficient fuel present. Is the fuel level adequate? Yes: proceed. No: refuel and retest.
- 2Inspect the wiring and connectors at the fuel level sensor for damage or corrosion. Are all connections secure and intact? Yes: proceed. No: repair or replace damaged components and retest.
- 3Use a multimeter to measure the voltage at the fuel level sensor. Is the voltage reading within 0.5 to 4.5 volts? Yes: suspect a faulty ECM. No: replace the sensor if readings are significantly low.
Common causes
- Faulty fuel level sensor
- Corroded or damaged wiring/connectors
- Faulty ECM
- Low fuel conditions
- Ground issues with the sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's safe to drive as long as you have enough fuel, but it can affect the accuracy of your fuel gauge.
Will this code come back after resetting?
If the underlying issue isn't fixed, yes, it'll likely return.
Why does this code often pair with other SPN codes?
This code can be triggered alongside others due to common issues like ground problems or wiring faults affecting multiple sensors.
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