This document is a fault code 1654 DTCs troubleshooting sheet for an engine misfire condition on cylinder 1. It explains the SPN 1323 FMI 11/31 amber lamp fault, ECM detection logic, likely mechanical and injector causes, and the diagnostic path used to confirm and clear the code.
Official fault code 1654 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2350, 2013-17 |
| System/Group | DTCs; engine misfire cylinder 1 |
| Year/Revision | Unknown; copyright 2017 |
| Pages | 4 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code: 1654
- PID, SPN 1323, FMI 11/31, Lamp: Amber
- Engine Misfire Cylinder 1 – Condition Exists
- 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) Read the fault codes
- Step 1B) Check for cylinder misfire
- Step 2A) Perform the cylinder cutout test
- 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 from the 2013-17 coverage group where the ECM detects Engine Misfire Cylinder 1 – Condition Exists. The procedure is engine-focused rather than chassis-specific, so the extract identifies the engine family, ECM, injector, fuel system fault codes, cylinder cutout test, valve lash, cylinder head or gasket damage, camshaft wear, air compressor timing, and ECM calibration checks, but it does not list individual truck makes or models. For manufacturer information, visit Cummins official website.
Who needs this fault code 1654 DTCs manual
Workshop owners, diesel mechanics, and fleet technicians need this code 1654 DTCs manual when diagnosing a cylinder 1 misfire, rough idle, low power, smoke, engine stumble, or related inactive counts after service work. It is useful when deciding whether to inspect for fuel system codes, run a Cylinder Cutout Test, replace cylinder number 1 injector, check mechanical causes, update ECM calibration, or clear the fault after a passed diagnostic.
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