fault code 2639 DTCs is the Cummins ISX11.9 CM2250 troubleshooting document for Aftertreatment Diesel Particulate Filter Differential Pressure – Data Valid But Above Normal Operational (SPN 3251, FMI 0/15). This 8-page factory guide explains the circuit, the conditions that set the code, and the guided repair steps used with the INSITE electronic service tool. The engine aftertreatment system monitors the soot load in the aftertreatment diesel particulate filter.
Official document details
| Brand | Cummins |
| Model coverage | ISX11.9 CM2250/ISB6.7 CM2250/ISC8.3 and ISL9 CM2250/ISX15 CM2250 |
| System / group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 2639 (PID S324) |
| SPN / FMI | 3251 / 0/15 |
| Warning lamp | None |
| Bulletin number | 2883445 |
| Revision | Last modified 11-Jun-2010 |
| Pages | 8 |
| File size | 0.2 MB |
| Format | |
| Language | English |
fault code 2639 DTCs table of contents
- Overview and circuit description
- Component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures table
- Guided troubleshooting steps
Applicable truck models
This troubleshooting procedure applies to Cummins ISX11.9 CM2250/ISB6.7 CM2250/ISC8.3 and ISL9 CM2250/ISX15 CM2250 engines. The aftertreatment diesel particulate filter is located in the exhaust system and is installed by the original equipment manufacturer (OEM). Refer to the OEM. The document states the code is set when electronic control module (ecm) detects that the soot load of the aftertreatment diesel particulate filter has reached the first stage of plugging. When the code is active, no dashboard warning lamp is commanded on for this information fault code. Full specifications and procedure references are published by Cummins on the Cummins official website.
Who needs this fault code 2639 DTCs manual
Diesel technicians and workshop owners diagnosing Data Valid But Above Normal Operational on ISX11.9 CM2250 engines need this reference. Possible causes documented in the Shop Talk section include the engine has been operating in light load operating, temperatures from being high enough to regenerate the aftertreatment, filter, possible engine damage that causes excessive black smoke to. The guide walks through each guided step and the INSITE electronic service tool tests required to validate the repair and clear the code.
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