The Cummins ISM code 1926 service document is a 5-page PDF fault-code sheet that covers the Aftertreatment 1 Fuel Pressure Sensor fault (code 1926) on Cummins ISM CM871 engines. It sets out the SPN, FMI and warning-lamp data, a plain-language description of the aftertreatment 1 fuel pressure sensor, and the step-by-step checks a technician follows to confirm, repair and clear the fault.
Official document details
| Brand | Cummins |
| Model coverage | ISM CM871 (2007-09) / DTCs; ISX CM871 (2007-09) / DTCs |
| System / group | ISM CM871 (2007-09) / DTCs |
| Fault code | 1926 (PID NONE, SPN 3480, FMI 2/2) |
| Warning lamp | Amber |
| Source | TruckFaultCodes reference, Copyright © 2017 |
| Pages | 5 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
- Circuit Diagram
Applicable truck models
This fault-code sheet applies to Cummins ISM CM871 (2007-09) engines and, where noted in the document, the related ISX CM871 platform used in on-highway trucks fitted with the aftertreatment 1 fuel pressure sensor. Verify that the ECM calibration matches the engine before starting diagnosis. Current engine specifications and service policy are published on the Cummins official website.
Cummins ISM code 1926 troubleshooting steps
The aftertreatment fuel pressure sensor is used to monitor the fuel pressure into the aftertreatment system. The electronic control module (ECM) supplies the aftertreatment fuel pressure sensor a 5 volt reference voltage. When the fuel pressure is low, the sensor signal voltage is low. The troubleshooting routine walks through key-on diagnostic-tool checks, inspection of the aftertreatment 1 fuel pressure sensor, and verifying that the fault goes inactive after the repair. The sheet reports fault code 1926 with SPN 3480, FMI 2/2 and an amber lamp so the technician can confirm the right diagnostic tree.
Who needs this Cummins ISM code 1926 manual
Heavy-duty truck technicians and workshop owners diagnosing the aftertreatment 1 fuel pressure sensor on Cummins ISM CM871 engines need this reference. It documents the fault code 1926 conditions, likely causes and the checks required to close the repair correctly the first time.
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