Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.
Possible causes:
1)Stuck in-range aftertreatment diesel particulate filter differential pressure sensor reading
2)High resistance in the aftertreatment diesel particulate filter differential pressure sensor signal or return wires
3)Plugged aftertreatment differential pressure sensor ports could cause this fault code if pressure is held in the port after the engine is turned off.
Possible reapirs:
1)Replace the aftertreatment diesel particulate filter differential pressure sensor.
2)Repair or replace the OEM harness.
3)Replace the ECM.v
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