This Cummins 1926 fault code document is a diagnostic troubleshooting procedure for an aftertreatment fuel pressure sensor signal that is erratic, intermittent, or incorrect. It explains how the ECM monitors the sensor, when the diagnostic runs, what happens when the fault is active, and how to validate the repair using INSITE™ electronic service tool.
Official Cummins 1926 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250 and ISX15 CM2250 |
| System/Group | Aftertreatment Fuel Pressure Sensor Circuit; DTCs |
| Publication no. | 4022250; 2883445 |
| Year/Revision | Last Modified: 11-Jun-2010 |
| Pages | 11 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- 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
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check for sensor circuit fault codes.
- Guided Step 2 – Check the aftertreatment fuel pressure sensor and circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This PDF applies to Cummins ISX11.9 CM2250 and ISX15 CM2250 engines using the aftertreatment fuel pressure sensor circuit described in the procedure. The extract identifies bulletin number 4022250 for ISX15 CM2250 and 2883445 for ISX11.9 CM2250, with associated procedures for the Electronic Control Module, ECM Calibration Code, Engine Wiring Harness, and Aftertreatment Fuel Pressure Sensor. For official manufacturer information, visit Cummins official website.
Who needs this Cummins 1926 fault code manual
Diesel technicians, fleet workshops, and diagnostic tool users need this manual when Fault Code 1926, PID S332, SPN 3480, FMI 2/2 is active and the amber CHECK ENGINE lamp or MIL is illuminated. The procedure helps confirm whether the issue is a sensor fault, connector problem, wiring harness fault, ECM response issue, or ECM calibration concern.
The document states that the aftertreatment fuel pressure sensor is located in the aftertreatment shutoff valve assembly. It shows checks for Fault Code 1927 and 1928, inspection of connector pins, circuit response tests using a jumper wire between the 5 volt SUPPLY pin and SIGNAL pin, ECM connector inspection, and final fault clearing after regeneration conditions are met. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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