This Cummins 1922 troubleshooting document explains Fault Code 1922 for the aftertreatment diesel particulate filter differential pressure system. It covers the fault reason, effects, diagnostic conditions, clearing requirements, guided checks, INSITE™ procedures, stationary regeneration, ECM calibration review, and DPF inspection or replacement decisions.
Official Cummins 1922 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL CM2150 engines; file group lists ISB6.7 CM2150 (2007-09) |
| System/Group | ISB6.7 CM2150 (2007-09) / DTCs; Aftertreatment System |
| Publication no. | Not shown in the extract |
| Year/Revision | Last Modified: 09-Aug-2010; later troubleshooting page shows Last Modified: 06-Jan-2011 |
| Pages | 29 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- FAULT CODE 1922
- 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
- Soot Level Stage table
- Troubleshooting Fault Code 1922
- Guided Step 1C – Monitor the aftertreatment diesel particulate filter differential pressure sensor with an electronic service tool
- Guided Step 1H – Perform the Aftertreatment Maintenance Filter Installation procedure
- Guided Step 2A-3 – Perform the stationary regeneration procedure
- Guided Step 5 – Check for active or inactive counts of Fault Codes 3616, 2449, or 2387
- Guided Step 5A – Inspect the turbocharger shaft movement
- Guided Step 8B – Disable the fault code
Applicable truck models
This file applies to Cummins ISB, ISC, and ISL CM2150 engines using an aftertreatment diesel particulate filter installed in the exhaust system by the original equipment manufacturer. The file information identifies ISB6.7 CM2150 (2007-09), while the extract also references ISB CM2100 and CM2150 Service Manual Bulletin 4021578 and ISC and ISL CM2150 Service Manual Bulletin 4021569 for related procedures. For official manufacturer information, visit Cummins official website.
Who needs this Cummins 1922 troubleshooting manual
Workshop owners, diesel mechanics, and fleet technicians need this Cummins 1922 troubleshooting manual when a red STOP ENGINE lamp appears with SPN 3251 FMI 0/0 and severe DPF soot loading. The procedure is useful when active and stationary regeneration are disabled, engine protection derate is applied, or INSITE™ must be used for an Aftertreatment Diesel Particulate Filter Maintenance Reset Test.
The document states that Fault Code 1922 means the soot load has exceeded recommended limits and reached the most severe level. It also notes possible causes such as light-load operation, regeneration inhibit messages, incorrect aftertreatment temperature sensor harness connections, connector pin issues, excessive black soot from a base engine problem, or calibration revisions that may apply to the ECM. Guided checks include monitoring aftertreatment diesel particulate filter differential pressure, verifying operator response to DPF lamps, performing the aftertreatment maintenance reset, running a stationary regeneration procedure, checking related fault counts, inspecting turbocharger shaft movement, reviewing ECM code and revision information, and disabling or clearing the fault after the clearing conditions are met.
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