What does code P244B mean?

DTC codes / P24xx · Auxiliary emission controls / P244B

P244BDiesel Particulate Filter Differential Pressure Sensor Offset

P244B indicates that the powertrain control module has detected an offset in the diesel particulate filter differential pressure sensor signal that exceeds calibrated limits. The computer compares the sensor reading at key-on, engine-off to a learned zero point and flags the code when the signal is biased high or low, meaning the sensor or its wiring is not reporting a true zero-pressure reference.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

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