P25B2
Fuel Level Sensor A or B Stuck
The ECM detects that one of the two level sensors is stuck but cannot identify which from the available signals — for example because the saddle-tank algorithm sees implausible delta only intermittently. Both sensors should be inspected.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- One stuck float — inspect bothCommon
Parts involved
- Fuel Level Sensor A
- Fuel Level Sensor B
P25B2 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.