6.7L Cummins Exhaust System – Aftertreatment Diesel Oxidation Catalyst – Test

To test the diesel oxidation catalyst, use INSITE electronic service tool to perform the Aftertreatment Diesel
Particulate Filter Regeneration Test. The efficiency of the diesel oxidation catalyst will be determined.
If a malfunction in the catalyst system is detected, fault codes will become active during the test. Follow the
appropriate fault code troubleshooting tree.