This code 559 DTCs document is a troubleshooting manual for Injector Metering Rail 1 Pressure faults on CM2150 engines. It explains the circuit description, fault conditions, fuel pressure checks, INSITE™ service tool steps, leak tests, repair paths, ECM calibration checks, and final fault-code clearing procedure.
Official code 559 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09), with paths and referenced procedures for ISB, QSB3.3, ISC, ISL, ISBe, ISDe, and ISLe CM2150 engines |
| System/Group | DTCs; Injector Metering Rail 1 Pressure; fuel rail pressure sensor and high-pressure fuel system diagnostics |
| Publication no. | Fault Code 08-fc559; referenced service manual bulletins include 4021578, 4021540, 4021597, 4021569, and 4021630 |
| Year/Revision | Last Modified: 03-Jan-2008; final page shows Last Modified: 21-Dec-2010 |
| Pages | 56 |
| File size | 0.7 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code Path Selection
- Overview
- Circuit Description
- 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
- Guided Step 1C – Check for adequate fuel supply.
- Guided Step 2 – High-pressure leak down test.
- Guided Step 2A – Check the rail pressure decay.
- Guided Step 3 – Check the low-pressure fuel system.
- Guided Step 4E-1 – Check the drain line restriction.
- Guided Step 6A-2 – Check the high-pressure connector torque.
Applicable truck models
This file covers Cummins CM2150 diagnostic paths for ISB or QSB3.3 engines and ISC or ISL engines, with later procedure references for ISB CM2150, B3.3 and QSB3.3 CM2150, ISBe and ISDe CM2150, and ISLe CM2150 service manuals. The fault applies when the ECM detects measured fuel rail pressure below commanded pressure by a calibrated limit, which can cause hard starting, low power, engine smoke, or a possible no-start condition. Official product and service information is available from Cummins.
Who needs this code 559 DTCs manual
Workshop owners, diesel mechanics, and fleet technicians need this code 559 DTCs manual when diagnosing low rail pressure complaints, amber CHECK ENGINE lamp events, fuel supply restrictions, pump leakage, injector return flow, fuel rail pressure relief valve leakage, air in fuel, or ECM calibration issues. The procedure uses INSITE™ electronic service tool checks and references Cummins service manual procedures for fuel pump pressure, fuel inlet restriction, drain line restriction, high-pressure connector torque, and fault-code clearing.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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