This cylinder misfire code DTCs document is a 7-page troubleshooting PDF for Fault Code 1654, Engine Misfire Cylinder 1 – Condition Exists. It explains how the ECM detects high or low cylinder 1 contribution at idle and how technicians validate, isolate, clear, or escalate the fault using INSITE™ electronic service tool procedures.
Official cylinder misfire code DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250 file group; extract references ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 associated procedures. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; ECM circuit and cylinder 1 misfire diagnostics. |
| Publication no. | Not stated for this PDF. Associated bulletin numbers shown include 4022250, 2883445, 4022256, and 4022255. |
| Year/Revision | Last Modified: 11-Jun-2010 and 03-Dec-2010; year otherwise unknown. |
| 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
- FAULT CODE 1654 – Engine Misfire Cylinder 1 – Condition Exists
- 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 – Perform diagnostic tests.
- Guided Step 3 – Check if an ECM calibration update is available.
- Guided Step 3B – Disable the fault code.
Applicable truck models
The extract ties this troubleshooting information to Cummins CM2250 engine platforms through associated procedures: ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The file group identifies ISB6.7 CM2250 (2010-12) DTC coverage, while the visible diagnostic text references ECM monitoring of cylinder contribution, cylinder number 1 injector checks, ECM Calibration Code Procedure 019-032, and Injector Procedure 006-026. For official manufacturer information, visit Cummins official website.
Who needs this cylinder misfire code DTCs manual
This misfire code DTCs manual is useful for diesel mechanics, fleet workshops, and service writers diagnosing amber CHECK ENGINE lamp complaints, low power, rough idle, smoke, or an engine misfire complaint on CM2250 engines. It supports a structured repair path: read fuel system fault codes, confirm the symptom, run the Cylinder Cutout Test, replace cylinder number 1 injector only when isolated, check valve lash or mechanical causes, then review ECM calibration status.
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