This Cummins code 499 troubleshooting document explains Fault Code 499 for the engine oil level sensor circuit on Cummins ISB6.7 CM2150 engines. It covers the circuit description, fault conditions, connector checks, sensor inspection, and clearing steps using INSITE™ electronic service tool.
Official Cummins code 499 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL oil level sensor circuit |
| System/Group | DTCs; Engine Oil Level Sensor Circuit – Voltage Below Normal or Shorted to Low Source |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the oil level sensor.
- Guided Step 3 – Clear the fault code.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 (2007-09) diagnostic trouble code work and describes Fault Code 499, PID P98, SPN 98, FMI 4. The extract also identifies the procedure as ISB, ISC, and ISL – Oil Level Sensor Circuit, with the oil level sensor located on the left side of the engine on the front oil dipstick port. For official manufacturer resources, visit Cummins official website.
Who needs this Cummins code 499 troubleshooting manual
Workshop owners, diesel mechanics, and fleet technicians need this code 499 troubleshooting manual when an amber CHECK ENGINE light relates to a disabled oil level sensor operation. The procedure helps confirm whether the issue is an inactive fault code, damaged connector pins, wiring harness damage, or a malfunctioning oil level sensor.
The document states that the diagnostic runs when the keyswitch is ON or when the engine is running. It lists the fault reason as an internal failure detected by the engine oil level sensor, with possible causes including an open or short circuit internally to the oil level sensor or a malfunctioning oil level sensor. The repair flow uses visual inspection, connector cleaning or repair, sensor replacement under Procedure 019-056, and inactive fault clearing with INSITE™ electronic service tool. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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