This Cummins ISB6.7 1228 document is a 5-page diagnostic procedure for Fault Code 1228 on Cummins ISB6.7 CM2350 engines. It explains the EGR valve position fault, circuit description, fault effects, clearing conditions, and troubleshooting steps for the EGR valve motor, connector, ECM calibration, and related active codes.
Official Cummins ISB6.7 1228 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2350 (2013-17) |
| System/Group | DTCs; EGR valve position |
| Year/Revision | Unknown; copyright 2017 shown in extract |
| Pages | 5 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code: 1228
- PID: P27
- SPN: 27
- FMI: 2/2
- LAMP: Amber
- EGR Valve Position – Data Erratic, Intermittent, or Incorrect
- Circuit Description
- Component Location
- Reason
- Effect
- 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
- Troubleshooting Steps
- Step 1A) Check for active fault codes.
- Step 2A) Inspect the EGR valve motor and connector pins.
- Step 2B) Check the circuit response.
- Step 3A) Check if an ECM calibration update is available.
- Step 3B) Disable the fault code.
Applicable truck models
This file applies to Cummins ISB6.7 CM2350 engines in the 2013-17 coverage group, as identified in the document metadata. The procedure covers Fault Code 1228, PID P27, SPN 27, FMI 2/2, where the EGR valve is unable to meet the commanded position for more than 30 seconds. The EGR valve position sensor is internal to the EGR valve assembly and cannot be serviced separately. The document also references possible inactive counts for Fault Codes 2272, 2349, or 2353 during the diagnostic process. For official product and service information, visit Cummins.
Who needs this Cummins ISB6.7 1228 manual
Workshop owners, diesel mechanics, and fleet technicians need this manual when diagnosing an amber CHECK ENGINE lamp or MIL linked to EGR Valve Position – Data Erratic, Intermittent, and Incorrect. It is useful when checking intermittent open or short conditions in the wiring harness, malfunctioning EGR valve position sensor concerns, a possible malfunctioning ECM, connector pin damage, or whether an ECM calibration update is available.
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