OBD-II code · Powertrain (generic, extended)
P238F Water in Fuel Condition Sensor B
Sensor B reports water in the fuel filter housing - drain the water trap immediately. Continued operation may cause damage to the high-pressure pump and injectors.
Is it safe to drive with P238F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWater has collected in the filter trap
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–0.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Water In Fuel Sensor B, Fuel Filter Housing B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.