Power Derate

Sometimes

Mileage / Regen Notes

Active regeneration may be inhibited or will not initiate while this fault is active on some ECM calibrations. Without accurate differential pressure data, the ECM cannot reliably calculate DPF soot load, which may prevent automatic or commanded regens. Some systems will default to a timer-based regen strategy, which can lead to incomplete regens or over-regeneration. Parked regen (service regen) may still be possible via scan tool but should only be performed after verifying the fault cause — do not perform regen if soot load is unknown or sensor data is unreliable. Clear fault and verify sensor operation before commanding any manual regen.