Cummins fault code 2273 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags the Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source condition (PID P411, SPN 411, FMI 3/3, Amber lamp). This 5-page PDF reproduces the manufacturer description, shop talk, component location and step-by-step troubleshooting so technicians can confirm and clear the code.
Cummins fault code 2273 overview
Cummins identifies this code as “Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal, or Shorted to High Source” on the EGR Differential Pressure Sensor Circuit. The exhaust gas recirculation (EGR) differential pressure sensor has two ports that sense exhaust gas pressure. The sensor outputs a voltage which represents the pressure difference between the two ports. The electronic control module (ECM) uses this pressure to determine how much exhaust gas is flowing through the EGR connection tube to the intake manifold. This information is used to control the EGR valve for correct emission levels. The ECM provides a 5 volt supply to the EGR differential pressure sensor on the sensor supply circuit.
According to the shop talk notes, possible causes include:
- An open return circuit in the engine harness, connectors, or sensor.
- A signal wire shorted to sensor supply or battery voltage.
- A failed EGR differential pressure sensor.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | EGR Differential Pressure Sensor Circuit — ISM CM871 fault codes |
| Fault code | 2273 (SPN 411, FMI 3/3) |
| PID | P411 |
| Warning lamp | Amber |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 5 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (PID, SPN, FMI, lamp)
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Applicable truck models and engines
This document applies to Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) equipped diesel engines that log Fault Code 2273. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before replacing parts. Full specifications are published on the Cummins official website.
Who needs this Cummins fault code 2273 manual
Heavy-duty truck technicians, fleet workshops and owner-operators diagnosing an electronic control module warning on ISM CM871 engines use this sheet to verify the fault before parts are replaced.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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