DESCRIPTION:DPF pressure out of range low.

MONITORED PARAMETER:1. DPF inlet pressure sensor.2. DPF outlet pressure sensor.

TYPICAL ENABLING CONDITIONS:Always on

MONITOR SEQUENCE:None

EXECUTION FREQUENCY:Continuous when enabling conditions met.

TYPICAL DURATION:Two seconds

DASH LAMPS:1. MIL2. CEL3. SEL

ENGINE REACTION:Derate 25%

VERIFICATION:Run engine between 1500 to 1900 rpm with a load less than 80%.

PROBABLE CAUSES:1. Inspect DPF outlet pressure hose for leaks/kinks/plugging.2. Inspect electrical connections upstream of the MCM (sensor, ATD 10-pin connector, VIH 31-pin connector, MCM 120-pin connector).3. Remove the DPF and inspect for signs of oil, fuel, or soot contamination. If found, find source.4. DPF failure.5. Performed parked regen.