Cummins fault code 415 is the Cummins ISM CM871 (2007-09) diagnostic reference for Engine Oil Rifle Pressure – Data Valid But Below Normal Operational Range – Most Severe Level, reported as PID P100, SPN 100, FMI 1/1 with an Red lamp. This 2-page workshop PDF covers the Engine Oil Rifle Pressure Circuit (ISX and ISM), giving the fault description, shop-talk notes, component location and the step-by-step troubleshooting tree. It is compiled from the TruckFaultCodes.com fault-code library (Copyright © 2017).
Official document details — Cummins fault code
| Brand | Cummins |
| Model coverage | ISM and ISX CM871 (2007-09) engines |
| System / Group | Engine Oil Rifle Pressure Circuit (ISX and ISM) / DTCs |
| Fault identifiers | PID P100, SPN 100, FMI 1/1, Red lamp |
| Source | TruckFaultCodes.com fault-code library (© 2017) |
| Pages | 2 |
| File size | 0.11 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code header (PID, SPN, FMI, lamp)
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Reading Cummins fault code 415
The ECM supplies 5 VDC to the engine oil pressure sensor on the sensor supply 1 circuit and a ground on the return circuit; when it detects a low signal voltage indicating low engine oil pressure this most-severe red-lamp code sets, and the underlying low oil pressure must be diagnosed.
The Cummins Shop Talk section advises confirming the ECM calibration is correct and recalibrating if necessary. Documented possible causes include:
- genuinely low engine oil pressure that must be troubleshot at its source
Component location manual information
The engine oil pressure sensor is on the left side of the engine block, below and to the rear of the integrated fuel system module (IFSM).
Applicable truck models
This document applies to Cummins ISM CM871 (2007-09) engines, and the same circuit description is shared with the ISX CM871 platform where noted in the extract. These engines power many Class 8 highway tractors and vocational trucks built by North American OEMs. Confirm the exact ECM calibration and OEM wiring against the manufacturer records; full engine support is published by Cummins official engine support.
Who needs this Cummins fault code 415 manual
Fleet technicians, independent diesel mechanics and workshop owners diagnosing an active engine oil rifle pressure condition will use this sheet to follow the correct troubleshooting order instead of replacing parts on guesswork.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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