This Cummins code 553 document is a fault-code troubleshooting procedure for high injector metering rail number 1 pressure on CM2150 engines. It explains the ECM logic, fuel rail pressure sensor checks, fuel pump actuator inspection, drain line restriction checks, and final fault-code clearing steps using INSITE™.
Official Cummins code 553 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB with CM2150, QSB3.3, ISBe and ISDe CM2150, ISC and ISL CM2150, ISLe CM2150 |
| System/Group | ISB6.7 CM2150 (2007-09) / DTCs |
| Publication no. | Not stated for this file; referenced service manuals include Bulletin 4021578, 4021540, 4021597, 4021569, and 4021630 |
| Year/Revision | Last modified 08-Jan-2008 and 20-Jul-2010; file year unknown |
| Pages | 22 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code Path Selection
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 553: Injector Metering Rail Number 1 Pressure – Data Valid but Above Normal Operating Range – Moderately Severe Level
- 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 1A – Read the fault codes
- Guided Step 2A – Verify rail fuel pressure sensor accuracy
- Guided Step 3A – Check drain line restriction
- Guided Step 4A – Check the fuel pump actuator and harness connector pins
- Guided Step 4B – Check the fuel pump actuator resistance
- Guided Step 4C – Monitor the fuel rail pressure at idle
- Guided Step 4D – Inspect the fuel pump actuator for damage
- Guided Step 5A – Disable the fault code
- Guided Step 5B – Clear the inactive fault codes
Applicable truck models
This procedure applies to Cummins engines identified in the extract, including ISB with CM2150, QSB3.3, ISBe and ISDe CM2150, ISC and ISL CM2150, and ISLe CM2150 applications. The fault relates to injector metering rail number 1 pressure where the ECM detects fuel pressure higher than commanded pressure, with possible amber CHECK ENGINE light, default fuel rail pressure value, reduced power, and possible engine noise at idle or light load. For official manufacturer information, visit Cummins official website.
Who needs this Cummins code 553 manual
Workshop owners, diesel mechanics, and diagnostic technicians need this manual when investigating active or inactive Fault Code 553, checking related codes 271, 272, 1117, or 2311, or confirming whether the rail fuel pressure sensor, fuel return drain line, fuel pump actuator, actuator connector pins, actuator resistance, or cut o-rings are causing excessive rail pressure. The procedure also records high-pressure fuel safety notes, including waiting for pressure to decrease after shutdown and not loosening high-pressure fittings while the engine is running.
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