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.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Water has collected in the filter trapCommon
Parts involved
- Water In Fuel Sensor B
- Fuel Filter Housing B
P238F 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.