The Cummins ISM code 1899 service document is a 5-page PDF fault-code sheet that covers the Exhaust Gas Recirculation Valve Delta Pressure fault (code 1899) on Cummins ISM CM871 engines. It sets out the SPN, FMI and warning-lamp data, a plain-language description of the differential 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 | 1899 (PID P411, SPN 411, FMI 1/18) |
| Warning lamp | Amber |
| Source | TruckFaultCodes reference, Copyright © 2017 |
| Pages | 5 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Description
- Shop Talk
- Troubleshooting Steps
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 differential 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 1899 troubleshooting steps
The exhaust gas recirculation (EGR) differential pressure sensor has two ports that sense exhaust pressure. The sensor outputs a voltage which represents the pressure difference between the two ports. The ECM uses this pressure to determine how much exhaust gas is flowing in the EGR connection tube to the intake manifold. The troubleshooting routine walks through key-on diagnostic-tool checks, inspection of the differential pressure sensor, and verifying that the fault goes inactive after the repair. The sheet reports fault code 1899 with SPN 411, FMI 1/18 and an amber lamp so the technician can confirm the right diagnostic tree.
Who needs this Cummins ISM code 1899 manual
Heavy-duty truck technicians and workshop owners diagnosing the differential pressure sensor on Cummins ISM CM871 engines need this reference. It documents the fault code 1899 conditions, likely causes and the checks required to close the repair correctly the first time.
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