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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The EGR differential pressure sensor has detected high EGR gas flow, or the EGR differential pressure reading is not valid for engine operating conditions.

Verify that 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.

This diagnostic checks the reading of the differential pressure sensor when the EGR valve is closed. Since the EGR valve is closed, the reading of the EGR differential pressure should be 0. If the ECM detects a reading higher than expected with the EGR valve closed, this fault code is logged.

Possible causes:

1)A damaged EGR differential pressure sensor
2)A stuck open EGR valve
3)EGR differential pressure sensor flow port cross-drillings are plugged with soot.

Possible repairs:

1)Clean the EGR differential pressure sensor flow ports.
2)Replace the EGR valve.
3)Repair or replace the engine harness.
4)Replace the ECM.

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