Cummins ISM CM875 (2003-06) Fault Code: 2359 PID: P411 SPN: 411 FMI: 0/16 EGR Differential Pressure Sensor – Data Valid but Above Normal Operating Range – Moderately Severe Level. EGR differential pressure sensor failed automatic calibration procedure or EGR differential pressure reading not valid for engine operating conditions.

Update: Prior to running INSITE? electronic service tool, verify that the ECM has the correct Calibration Software Phase. There have been changes in the calibrations that reduce false occurrences of the fault code and also affect the tolerable sensor range.

The ECM Calibration Software Phase can be checked in INSITE? electronic service tool, under Features and Parameters.

1)Expand the selection for System ID and Dataplate, then go to Calibration Information.
2)ISX Engines with CM870 built during and after January 2004 require software phase 06050402 or greater from the February 2007 INCAL? DVD or newer.
3)ISX Engines with CM870 built before January 2004 require software phase 05050000 or greater from the April 2007 INCAL? DVD or newer.
The ECM Calibration Revision History can be found at: http://insite.cummins.com/insite/tools/incal/index.html

This is a warrantable calibration change.

Possible causes:

1)A plugged or leaking low or high EGR differential pressure tubes
2)A damaged EGR differential pressure sensor
3)A stuck open or closed EGR valve
4)A damaged EGR connection tube hose
5)A leak in the EGR connection tube hoses or tubes
6)A damaged variable geometry turbocharger
7)A damaged variable geometry actuator
8)A damaged turbocharger control valve
9)A damaged turbocharger control shutoff valve
10)A plugged turbocharger control shutoff valve filter
11)A leak in the air line supplying air pressure to the turbocharger control shutoff valve, turbocharger control valve, or variable geometry actuator
12)Incorrectly installed EGR differential pressure tubes
13)Incorrectly installed EGR differential pressure sensor
14)Expanded exhaust gases trapped in differential pressure tube
15)A damaged EGR cooler that allows coolant into the crossover tube and EGR differential pressure sensor tubes.
If Fault Code 2359 is active after a key cycle and the engine is not running, it will be set inactive only if the following conditions are met:

1)Engine coolant temperature is greater than 67?C [153?F]
2)Intake manifold air temperature is greater than 7?C [45?F]
3)Keyswitch transitions from ON to OFF for 30 seconds
4)EGR differential pressure sensor reading is within a set calibration threshold near zero.

Possible repairs:

1)Tighten any loose connections and clean the battery terminals.
2)Tighten the fittings, replace the EGR differential pressure tube and the adapter, or correct the exhaust leaks.
3)Install the EGR differential pressure tubes correctly.
4)If coolant is found in the EGR differential pressure sensor tubes, they must be replaced.
5)Install the EGR differential pressure sensor correctly.
6)Tighten the differential pressure tube fittings.
7)Replace the EGR valve.
8)Repair leaks.
9)Replace the turbocharger control valve.
10)Replace the turbocharger assembly.
11)Replace the turbocharger actuator.
12)Repair the air supply from the OEM air tanks.
13)Replace the turbocharger.