What does code P238D mean?

Q: What does code P238D mean?

Water in Fuel Sensor B Circuit High. P238D indicates that the powertrain control module has detected an abnormally high voltage on the Water in Fuel Sensor B circuit, which typically means the sensor signal wire is shorted to voltage or the sensor's internal resistance has gone open. The computer expects a voltage within a calibrated range that reflects the presence or absence of water in the fuel, and a high reading falls outside that expected window.

DTC codes / P23xx · Ignition system and misfire / P238D

P238DWater in Fuel Sensor B Circuit High

P238D indicates that the powertrain control module has detected an abnormally high voltage on the Water in Fuel Sensor B circuit, which typically means the sensor signal wire is shorted to voltage or the sensor's internal resistance has gone open. The computer expects a voltage within a calibrated range that reflects the presence or absence of water in the fuel, and a high reading falls outside that expected window.

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.