fault code 2373 DTCs is documented in this official Cummins ISX11.9 CM2250 diagnostic and troubleshooting manual. The 16-page PDF explains the Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source condition on the exhaust gas pressure sensor circuit, including the SPN, FMI and PID identifiers a technician reads with the Cummins INSITE electronic service tool.
fault code 2373 DTCs document details
| Brand | Cummins |
| Model coverage | ISX11.9 CM2250, ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 |
| System / group | Exhaust gas pressure sensor circuit |
| Fault code | 2373 (PID P131) |
| SPN | SPN 1209 |
| FMI | FMI 3/3 |
| Warning lamp | Amber |
| Pages | 16 |
| Revision | Last modified 28-Dec-2010 |
| Format | |
| Language | English |
Document table of contents
- Circuit description and component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures table
- Guided troubleshooting steps
Common causes and symptoms
- An open return circuit in the engine harness, connectors, or sensor
- A signal wire shorted to sensor supply or battery voltage
Applicable truck models and engines
This document applies to the ISX11.9 CM2250, ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 engine families running the CM2250 electronic control module. When SPN 1209 / FMI 3/3 sets, there is no effect on engine performance while the fault is active. Coverage and part numbers should always be verified against current service data on the Cummins official support site before ordering components.
Who needs this fault code 2373 DTCs manual
Fleet technicians, mobile mechanics and workshop owners use this code 2373 DTCs reference to confirm the exhaust gas pressure sensor diagnosis before replacing parts, and to follow the same clearing steps Cummins publishes for INSITE. Reading the live data and freeze-frame with INSITE before any parts replacement helps avoid unnecessary repairs and repeat shop visits. The revision date of 28-Dec-2010 and the SPN, FMI and PID values make it a reliable bench reference for ISX11.9 CM2250 diagnostics.
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