OBD-II code · Powertrain (generic, extended)
P238B Water in Fuel Sensor B Circuit Range or Performance
Same as P238A with the signal in plausible range yet not matching the engine model.
Is it safe to drive with P238B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor element drifted
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.4 h
- Emissions test
- Usually unaffected
- Parts involved
- Water In Fuel Sensor B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.