This code 649 DTCs document is a troubleshooting file for the engine oil change interval maintenance reminder on CM2250 engines. It explains why Fault Code 649 becomes active, what lamp behavior is expected, and how INSITE™ electronic service tool is used to reset the Maintenance Monitor after the oil and filter service.
Official code 649 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; associated coverage also lists ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSL9 CM2250, QSB6.7 CM2250, and other CM2150/CM2220 engine families in the procedure table. |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Maintenance Reminder; Engine Oil Change Interval – Condition Exists. |
| Publication no. | 4022254 for ISB6.7 CM2250 in the associated procedures table. |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010; file year unknown. |
| Pages | 6 |
| 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
- FAULT CODE 649 – Engine Oil Change Interval – Condition Exists
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check ECM calibration and clear fault codes.
Applicable truck models
The file is identified for Cummins ISB6.7 CM2250 DTC service work and its procedure table references multiple Cummins engine models, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The diagnostic concerns a Maintenance Monitor event, not a failed oil pressure or oil level circuit: the ECM detects that the programmed lubrication oil drain limit has been reached, flashes the amber CHECK ENGINE lamp after the diagnostic runs and fails, and turns off the amber MAINTENANCE lamp after the diagnostic runs and passes. For engine and service network information, visit the Cummins official website.
Who needs this code 649 DTCs manual
Workshop owners, fleet technicians, and diesel mechanics need this manual when a CM2250 engine reports Fault Code: 649, PID: S115, SPN: 1378, FMI: 31 with a maintenance lamp. The procedure tells the technician to verify the active code with INSITE™ electronic service tool, change the engine lubricating oil and filter when required, reset the Maintenance Monitor, compare ECM code and revision data against ECM Calibration Revision History, and calibrate the ECM under Procedure 019-032 if an applicable update is needed.
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