This document is a Cummins EGR fault 2272 troubleshooting manual for the EGR valve position circuit on CM2250 engines. It explains the low-voltage or short-to-low-source fault condition, the effect on EGR valve actuation, and the guided checks used with INSITE™ electronic service tool.
Official Cummins EGR fault 2272 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; ISC8.3 and ISL9 CM2250; ISX11.9 CM2250; ISX15 CM2250; QSL9 CM2250; QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; EGR Valve Position Circuit |
| Publication no. | 4022254; 4022257; 4022250; 2883445; 4022256; 4022255 listed in associated procedures |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010 |
| Pages | 17 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- FAULT CODE 2272
- 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 – Check ECM calibration and clear fault codes.
Applicable truck models
This fault-code procedure applies to Cummins CM2250 engine families named in the document: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The procedure covers the EGR valve position sensor circuits A, B, and C, the +5 volt SUPPLY and RETURN circuits, ECM connector checks, engine harness continuity checks, short-to-ground checks, and ECM calibration review; for manufacturer information, visit Cummins official website.
Who needs this Cummins EGR fault 2272 manual
Mechanics, diesel diagnostic technicians, and workshop owners need this EGR fault 2272 manual when an amber CHECK ENGINE lamp or MIL is linked to SPN 27 FMI 4/4. It is useful for confirming whether the fault is caused by connector damage, sensor supply voltage loss, an open circuit, a short circuit, a short to ground, engine harness damage, ECM connector damage, or an ECM calibration issue.
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