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Cummins ISX CM870 (2003-06) Fault Code: 2961 PID: P412 SPN: 412 FMI: 0/15 Exhaust Gas Recirculation Temperature – Data Valid But Above Normal Operating Range – Least Severe Level.
NOTE: This fault code may become active if the protective shipping sticker is not removed from the port located on the end opposite of the connector. When installing a new turbocharger control valve, make sure the adhesive cover is removed.
NOTE: Before performing the INSITE? electronic service tool EGR Valve and EGR Valve/Turbocharger Operational Test, be sure the ECM Calibration Software Phase is updated to the latest Software Phase. The ECM Calibration Phase Software can be checked in INSITE? electronic service tool, under ‘Features and Parameters’. Expand the selection for ‘System ID and Dataplate’ and go to ‘Calibration Information’. If the Software Phase is earlier than shown below, recalibrate the ECM using the January 2006 INCAL? CD-ROM, or later. Engines with the Software Phase listed below or later do not require a recalibration.
ISX engines with CM870 (engines built after January 2004) require Software Phase 06050302.
ISX engines with CM870 (engines built before January 2004) require no changes at this time.
This is a warrantable calibration change.
Possible causes:
1)Fouled EGR cooler2)Intake manifold, charge air cooler, or EGR leaks3)Failed EGR differential pressure tubes4)Failed EGR valve5)Stuck open turbocharger control valve6)EGR differential pressure sensor reading low7)EGR valve position sensor reading low8)High exhaust temperatures9)Stuck closed variable geometry turbocharger.NOTE: This fault code will not become active without a load in the shop. The engine must be loaded to trip this fault code and to determine if the failure has been found and fixed.
Possible repairs:
1)Replace the turbocharger.2)Repair air leaks.3)Replace the turbocharger control valve.4)Replace the turbocharger assembly.5)Replace the turbocharger actuator.6)Replace the turbocharger control valve.7)Repair the air supply from the OEM air tanks.8)Replace the turbocharger control shutoff valve filter.9)Replace the turbocharger control shutoff valve.10)Replace the variable geometry turbocharger.11)Tighten or replace the EGR differential pressure tubes.12)Clean or replace the EGR cooler.
Cummins ISX CM870 (2003-06) Fault Code: 2554 PID: P95 SPN: 1209 FMI: 2/2 Exhaust Gas Pressure – Data Erratic, Intermittent or Incorrect. The exhaust gas pressure sensor is reading an erratic value.
Cummins ISX CM870 (2003-06) Fault Code: 2552 PID: P157 SPN: 157 FMI: 0/16 Front Fueling Actuator Pressure High – Warning. Unexpected high fueling detected on the front bank.
Cummins ISX CM870 (2003-06) Fault Code: 2551 PID: P129 SPN: 1349 FMI: 0/16 Rear Fueling Actuator Pressure High – Warning. Unexpected high fueling detected on the rear bank.
Cummins ISX CM870 (2003-06) Fault Code: 2385 PID: S027 SPN: 641 FMI: 3 Variable geometry turbocharger actuator driver circuit – voltage above normal or shorted to high source. Open circuit or high voltage detected at turbocharger control valve circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2384 PID: S027 SPN: 641 FMI: 4 Variable geometry turbocharger actuator driver circuit – voltage below normal or shorted to low source. Low voltage detected at turbocharger control valve circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2377 PID: S33 SPN: 647 FMI: 3/3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.