This EGR fault code DTCs document is a troubleshooting guide for Fault Code 2349 on CM2150 engines. It explains the EGR valve control circuit, the conditions that set the code, and the guided checks used with INSITE™ electronic service tool. The fault describes current below normal or an open circuit in the EGR valve motor circuit.
Official EGR fault code DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL with CM2150; ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; EGR Valve Position Circuit |
| Publication no. | Not shown in the extract |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 11 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the EGR valve motor and circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Clear the fault code.
Applicable truck models
This document applies to Cummins ISB, ISC, and ISL engines with CM2150 controls, including ISB Series 6.7L Engines with CM2100 and CM2150 Common Rail Fuel Systems where Procedure 011-022 is referenced. The extract identifies the EGR valve on the air intake connection and covers Fault Code 2349, PID S146, SPN 2791, FMI 5, with an amber lamp and disabled EGR valve actuation. For official engine support and service information, visit Cummins official website.
Who needs this EGR fault code DTCs manual
Workshop owners, diesel mechanics, and fleet technicians need this EGR fault code DTCs manual when diagnosing an active or inactive Code 2349. It is useful when checking EGR motor supply A, supply B, supply C, return circuits, connector pins, engine harness faults, and possible ECM replacement authorization.
The procedure directs the technician to verify ECM calibration through QuickServe™ Online, then inspect the EGR valve motor connector for loose, corroded, bent, broken, pushed back, or expanded pins. It also lists moisture, damaged seals, debris, broken connector shells, wire insulation damage, and damaged locking tabs as inspection points. Voltage checks call for 3.80 to 4.50-VDC between each EGR motor supply pin and the EGR motor RETURN pin at the motor connector, then at the ECM engine connector if required. If the connector removal and installation corrects the condition, no repair is required. If the EGR valve motor has an open circuit, the document directs replacement of the EGR valve. If the engine harness has an open circuit, the document directs harness repair or replacement.
The final steps cover disabling the fault by starting the engine and idling for 1 minute, verifying that Fault Code 2349 is inactive with INSITE™, and clearing inactive fault codes. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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