This Cummins 281 fuel pump document is a diagnostic procedure for Fault Code 281 on CM2250 high pressure pump systems. It explains the fuel pump pressurizing assembly fault, the likely mechanical causes, and the guided checks used before repair validation. The PDF is 9 pages and is written for service diagnosis with INSITE™ electronic service tool.
Official Cummins 281 fuel pump document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250 (2010-12); extract also lists QSB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, ISL8.9 CM2150 SN, and ISZ13 CM2150 in associated procedures |
| System/Group | DTCs; high pressure pump; Engine Fuel Pump Pressurizing Assembly 1 |
| Publication no. | Not shown in extract |
| Year/Revision | Unknown; last modified 11-Jun-2010 and 30-Aug-2010 |
| Pages | 9 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 281 Engine Fuel Pump Pressurizing Assembly 1 – Mechanical System Not Responding or Out of Adjustment
- 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 the fault codes
- Guided Step 2 – Preliminary fuel system checks
- Guided Step 3 – Check ECM calibration and clear fault codes
Applicable truck models
This file covers Cummins electronic engine diagnostics for Fault Code 281, PID S126, SPN 1347, FMI 7, with the amber CHECK ENGINE lamp and a code reason of pumping imbalance between pumping plungers. The file information identifies ISB6.7 CM2250 (2010-12), while the procedure table in the extract also references QSB6.7 CM2250 and other CM2250 engines, including ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, and QSL9 CM2250. Associated service procedures include Procedure 005-025 for the fuel pump gear pump, Procedure 005-227 for the fuel pump head, Procedure 006-003 for air in fuel, Procedure 006-020 for fuel inlet restriction, and Procedure 019-032 for ECM Calibration Code. See the manufacturer at Cummins official website.
Who needs this Cummins 281 fuel pump manual
Workshop technicians, diesel mechanics, and fleet service owners need this Cummins 281 fuel pump manual when an engine will not run, has possible low power, shows rising engine oil level, or sets Fault Code 281 during a steady state loaded condition. The procedure supports checks for fuel gear pump pressure, air in the fuel, ECM calibration revision, fault clearing, and high pressure fuel pump head replacement decisions.
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