fault code 2637 DTCs is the Cummins ISX11.9 CM2250 troubleshooting document for Aftertreatment Diesel Oxidation Catalyst Face Plugged – Root Cause Not Known (SPN 5018, FMI 11). This 9-page factory guide explains the circuit, the conditions that set the code, and the guided repair steps used with the INSITE electronic service tool. This fault code is set when the intake face of the diesel oxidation catalyst is detected to be plugged with soot.
Official document details
| Brand | Cummins |
| Model coverage | 049 ISX11.9 CM2250 2883445 |
| System / group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 2637 (PID S380) |
| SPN / FMI | 5018 / 11 |
| Warning lamp | None |
| Bulletin number | 2883445 |
| Revision | Last modified 11-Jun-2010 |
| Pages | 9 |
| File size | 0.2 MB |
| Format | |
| Language | English |
fault code 2637 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 049 ISX11.9 CM2250 2883445 engines. The aftertreatment diesel oxidation catalyst is located in the exhaust system. The location of the catalyst can vary, depending on the original equipment manufacturer. The document states the code is set when ecm detects that the intake face of the diesel oxidation catalyst is plugged with soot. 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 2637 DTCs manual
Diesel technicians and workshop owners diagnosing Root Cause Not Known on ISX11.9 CM2250 engines need this reference. Possible causes documented in the Shop Talk section include engine oil or fuel plugging the front face of. The guide walks through each guided step and the INSITE electronic service tool tests required to validate the repair and clear the code. Each guided step lists the keyswitch position, the required action, and the YES or NO branch that follows.
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