Cummins PowerCommand Error Code 4

Cummins Generator Critical System

Model: PowerCommand | Code: 4

Applicable Systems
PowerCommand

Symptoms

Shutdown - Low oil pressure. The engine has shut down due to critically low oil pressure.

Possible Causes

  • Low engine oil level
  • Oil pump failure or oil filter clogged

Troubleshooting Steps

  1. Step 1: Check the engine oil level with the dipstick
    Oil level is below minimum
  2. Step 2: Inspect for oil leaks and check the oil pressure sensor
    Leak found or sensor is faulty

How to Reset

To reset: Fix the oil level or pressure issue, then reset the controller.

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Source: Cummins Power Generation Control Manual, Cummins Inc.

Category: Generator

Published: 2026-10-22