This Cummins 1664 fault code document is an 8-page troubleshooting PDF for an aftertreatment diesel oxidation catalyst missing condition. It explains how the ECM detects Fault Code 1664 during active regeneration, what lamps and derates can occur, and which INSITE™ checks support repair validation.
Official Cummins 1664 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | Aftertreatment Diesel Oxidation Catalyst Circuit / DTCs |
| Publication no. | Bulletin references include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010 and 17-Jan-2011 |
| Pages | 8 |
| 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 for sensor circuit fault codes.
- Guided Step 1A – Check for fault codes.
- Guided Step 1B – Check for the presence of a diesel oxidation catalyst.
- Guided Step 2 – Check ECM calibration and clear fault codes.
- Guided Step 2A – Check if an ECM calibration update is available.
- Guided Step 2B – Disable the fault code.
Applicable truck models
This file applies to Cummins CM2250 engines listed in the associated procedures table, including ISB6.7 CM2250 and QSB6.7 CM2250, with additional coverage shown for ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, and QSL9 CM2250. The procedure concerns the aftertreatment diesel oxidation catalyst, the aftertreatment diesel particulate filter intake temperature sensor, the aftertreatment diesel oxidation catalyst intake temperature sensor, and related active regeneration checks. Catalyst location can vary by original equipment manufacturer, so the document directs users to the OEM service manual for vehicle-specific placement. See official manufacturer information at Cummins.
Who needs this Cummins 1664 fault code manual
This manual is for diesel technicians, fleet mechanics, and workshop owners diagnosing an amber CHECK ENGINE lamp or MIL with SPN 4796 FMI 31/31. It is useful when active and stationary regeneration are disabled and the repair path requires checking sensor circuit fault codes 3313, 3314, 3315, 3316, 3317, or 3318, confirming the diesel oxidation catalyst is present, reviewing ECM Calibration Code Procedure 019-032, and clearing the code with INSITE™ electronic service tool.
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