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Aftertreatment Diesel Particulate Filter Differential Pressure - Data Valid but Above Normal Operational Range - Moderately Severe Level. The soot load of the aftertreatment diesel particulate filter has exceeded the recommended limits.
The aftertreatment dash lamp will flash. Engine protection derate
Catalyst Face Plugged - Root Cause Not Known. The front face of the aftertreatment diesel oxidation catalyst has been detected to be plugged with soot.
Active aftertreatment diesel particulate filter regeneration will be disabled.