What does code P238F mean?

Q: What does code P238F mean?

Water in Fuel Condition Sensor B. P238F indicates that the powertrain control module has detected a fault in the water-in-fuel condition sensor circuit for sensor B, which is typically the secondary sensor on a dual-filter system. The computer monitors the sensor's signal voltage and sets this code when the reading falls outside the expected range or behaves erratically, signaling that the sensor or its wiring is not reporting correctly.

DTC codes / P23xx · Ignition system and misfire / P238F

P238FWater in Fuel Condition Sensor B

P238F indicates that the powertrain control module has detected a fault in the water-in-fuel condition sensor circuit for sensor B, which is typically the secondary sensor on a dual-filter system. The computer monitors the sensor's signal voltage and sets this code when the reading falls outside the expected range or behaves erratically, signaling that the sensor or its wiring is not reporting correctly.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.