The fault code 415 DTCs troubleshooting manual is the official Cummins diagnostic procedure for the engine oil rifle pressure circuit on the ISX11.9 CM2250 engine platform. The ECM uses an oil pressure switch or oil pressure sensor to monitor lubricating oil pressure, and this fault triggers when pressure drops below the engine-protection limit. This 6-page PDF walks a technician from symptom to verified repair.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | Cummins ISX11.9 CM2250 (2010-12), Cummins ISX12 CM2250 (2010-12) |
| System / Group | engine oil rifle pressure circuit, DTCs |
| Fault code reference | Fault Code 415 — SPN 100, FMI 1 |
| Warning lamp | a red STOP lamp |
| Revision (Last Modified) | 11-Jun-2010 |
| Pages | 6 |
| File size | 0.18 MB |
| Format | |
| Language | English |
fault code 415 DTCs document contents
- Overview and Circuit Description
- 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
- Verify the repair
Applicable truck models covered
This procedure applies to Cummins engines that report Fault Code 415 (SPN 100, FMI 1), including the Cummins ISX11.9 CM2250 (2010-12), Cummins ISX12 CM2250 (2010-12). Always confirm the exact calibration and publication for your engine on the official Cummins engine support site before ordering parts.
Common causes and symptoms
This is the most-severe engine-protection fault and commands the red STOP lamp; continued operation risks serious engine damage from low oil pressure. Shop Talk in the document lists the most likely causes:
- Genuinely low engine oil pressure
- Incorrect oil level
- A damaged oil pressure switch
- An engine harness shorted to ground
Who needs the fault code 415 DTCs manual
Diesel technicians and workshop owners diagnosing Fault Code 415 on ISX11.9 CM2250 trucks need this manual to follow the guided steps, use the correct connector pins and verify the repair with INSITE electronic service tool instead of guessing.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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