Fuel Level Sensor A Circuit Range/Performance Problem
The fuel level sensor is reporting an out-of-range reading to the ECU.
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What it means (plain English)
The fuel level sensor isn't giving a correct reading, often showing empty even when there's fuel. It measures resistance in ohms for fuel level; if it's too high or low, you get this code.
What the computer is actually seeing
The powertrain control module (PCM) sees a fuel level sensor voltage signal that's outside the expected range—0.5V to 4.5V, with 0.5V usually meaning empty and 4.5V meaning full.
What a healthy reading looks like
Fuel level sensor output should vary between 0.5V (empty) to 4.5V (full) depending on the actual 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.
- 1Check the fuel level in the tank; make sure it's not actually empty.
- 2Inspect the wiring and connectors for the fuel level sensor for damage or corrosion.
- 3Using a multimeter, check the voltage output of the fuel level sensor while varying the fuel level. Expected values: 0.5V (empty) to 4.5V (full).
- 4If voltage is as expected, suspect a faulty PCM. If voltage is out of range, replace the fuel level sensor.
Common causes
- Faulty fuel level sensor
- Open or shorted wiring in the fuel level circuit
- Faulty PCM
- Improper ground connection
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
Yes, but you might run out of fuel unexpectedly since the gauge may not work properly.
Will this code come back after clearing?
It can if the underlying issue isn't resolved, like a faulty sensor or bad wiring.
Why does this code pair with P0460?
P0460 indicates a similar issue where the sensor's signal is either missing or not detected.
Working a real vehicle right now?
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