This document is a fault code 2273 DTCs troubleshooting manual for the EGR differential pressure sensor circuit on CM2150 engines. It explains the circuit description, fault conditions, probable causes, guided diagnostic steps, ECM and harness checks, and fault clearing procedure. The file is intended for technicians using INSITE™ electronic service tool and Cummins service procedures.
Official fault code 2273 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL with CM2150; file group lists ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; EGR Differential Pressure Sensor Circuit |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 14 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 2273
- 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
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the EGR valve delta pressure sensor and circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4B – Clear the inactive fault codes.
Applicable truck models
This PDF applies to Cummins ISB, ISC, and ISL engines with CM2150 control, with the library record identifying ISB6.7 CM2150 (2007-09). The fault code covers the Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit, where high signal voltage is detected at the EGR differential pressure sensor circuit. Component location is described as the intake side of the engine, with reference to Procedure 100-002 (Engine Diagrams) in Section E for detailed views. For official manufacturer information, visit Cummins official website.
Who needs this fault code 2273 DTCs manual
Workshop owners, diesel mechanics, and fleet technicians need this code 2273 DTCs manual when diagnosing an amber CHECK ENGINE light, disabled EGR valve actuation, or a sensor signal above 4.8-VDC for more than 4 seconds. The procedure supports checks for Fault Code 386, inactive or intermittent fault codes, connector pin damage, 4.75 to 5.25 VDC supply voltage, open RETURN circuit faults, and engine harness or ECM connector issues.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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