OBD-II code · Powertrain (generic, extended)
P25B1 Fuel Level Sensor B Stuck
Same condition as sensor A stuck, applied to the second fuel level sensor B. Saddle tanks (often AWD vehicles) and large trucks use two sensors — one per tank chamber — averaged for total level. A stuck B leaves only A and reduces accuracy.
Is it safe to drive with P25B1?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyStuck float
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Level Sensor B
Related codes
- P25B0Fuel Level Sensor A Stuck
- P25DCFuel Level Sensor C Stuck
- P25AEPiston Cooling Oil Pressure Too Low
- P25AFCoolant Temperature Control Module Requested MIL Illumination
- P25B2Fuel Level Sensor A or B Stuck
- P25B3Turbocharger/Supercharger Wastegate A Stuck Open
- P25B4Turbocharger/Supercharger Wastegate A Stuck Closed
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.