This Cummins 3228 fault code document is a troubleshooting PDF for the aftertreatment intake NOx sensor circuit on CM2250 engines. It explains Fault Code 3228, SPN 3216 FMI 2/2, including conditions for running the diagnostic, fault effects, clearing conditions, and guided repair steps. The file is aimed at technicians using INSITE™ electronic service tool for Cummins aftertreatment diagnostics.
Official Cummins 3228 fault code document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Aftertreatment Intake NOx Sensor Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250; 4022257 for ISC8.3 and ISL9 CM2250; 4022250 for ISX15 CM2250; 2883445 for ISX11.9 CM2250 |
| Year/Revision | Unknown; last modified 21-Jul-2010 and 11-Jun-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 3228 – Aftertreatment Intake NOx Sensor – Data Erratic, Intermittent, or Incorrect
- 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 EGR system for leaks.
- Guided Step 3 – Check ECM calibration and clear fault codes.
- Guided Step 3B – Disable the fault code.
Applicable truck models
This procedure covers Cummins CM2250 engine applications listed in the document: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, and ISX15 CM2250. The described circuit is the aftertreatment intake NOx sensor circuit, with the sensor mounted near the turbocharger turbine outlet and communicating with the ECM over the J1939 data link. See official Cummins service information at Cummins official website.
Who needs this Cummins 3228 fault code manual
Workshop owners, fleet mechanics, and diesel diagnostic technicians need this file when an amber CHECK ENGINE lamp or MIL is linked to Fault Code 3228 and the aftertreatment intake NOx sensor reading is erratic, intermittent, or incorrect. The manual supports checks for related active fault codes 1885, 3232, 3649, 3682, or 3748, EGR system leaks, ECM calibration revision, and replacement of the aftertreatment intake NOx sensor under Procedure 019-463.
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