This Cummins EGR fault 1228 document is a troubleshooting manual for an EGR valve position fault where data is erratic, intermittent, or incorrect. It explains the circuit, fault setting conditions, ECM actions, clearing conditions, and guided diagnostic steps for the EGR valve position sensor and circuit. The file is a 7-page PDF from the Cummins service information extract for Code 1228.
Official Cummins EGR fault 1228 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250 and ISX15 CM2250 are named in the document; file listing also references ISB6.7 CM2250 (2010-12) |
| System/Group | EGR Valve Position Circuit / DTCs |
| Publication no. | Not shown for Code 1228; associated procedure bulletins list 4022250 and 2883445 |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010 |
| Pages | 7 |
| 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 position sensor and circuit.
- Guided Step 3 – Check ECM calibration and clear fault codes.
Applicable truck models
The procedure names ISX11.9 CM2250 and ISX15 CM2250 engine models in the associated procedures table, with EGR Valve Procedure 011-022 and ECM Calibration Code Procedure 019-032. The file information also places the document under Cummins ISB6.7 CM2250 (2010-12) / DTCs, but the visible diagnostic pages identify ISX11.9 CM2250/ISX15 CM2250 for the EGR Valve Position Circuit. For manufacturer information, visit Cummins official website.
Who needs this Cummins EGR fault 1228 manual
This manual is for diesel technicians, fleet workshops, and service managers diagnosing Fault Code 1228 with an amber CHECK ENGINE lamp or MIL, reduced engine performance, or an EGR valve that tries to close. It is useful when checking connector pins, circuit response with INSITE™ electronic service tool, ECM calibration revision, and fault clearing after repair.
The diagnostic text describes an EGR valve controlled by a brushless motor using EGR motor A, B, and C wires, with three internal position sensors reporting valve location to the ECM. It lists possible causes including intermittent open or short in the wiring harness, malfunctioning EGR valve position sensor, malfunctioning ECM, and sticky or broken EGR valve. The guided checks cover active fault codes 2272, 2349, or 2353, inspection for corrosion, moisture, damaged seals, wire insulation damage, and connector locking tab damage. The final steps compare the ECM code and revision number, update calibration if needed, then disable and clear the fault code under the stated clearing conditions.
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