P25B0
Fuel Level Sensor A Stuck
Fuel level sensor A (typically the float in the main fuel tank section) reports a value that does not change over a long driving distance — the float is mechanically stuck against the tank wall, baffle or pump module. Without level changes the EVAP monitor cannot run and remaining-range estimates are wrong.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Stuck floatCommon
- Bent float arm catching the tank wallPossible
Parts involved
- Fuel Level Sensor A
P25B0 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.