Modern diesel engines rely on advanced aftertreatment systems to meet today’s strict emissions standards - and when these systems fail, downtime can be both costly and complex to resolve. This hands-on, technician-focused course is designed to give you the knowledge and confidence to diagnose, troubleshoot, and maintain Cummins aftertreatment emission systems with precision.
Through real-world examples and step-by-step instruction, you’ll explore the full range of Cummins aftertreatment components, including Diesel Oxidation Catalysts (DOC), Diesel Particulate Filters (DPF), and Selective Catalytic Reduction (SCR) systems. The course goes beyond theory - equipping you with proven strategies to tackle common fault codes, reduce repeat failures, prevent unnecessary part replacements, and reduce downtime.
Whether you're working in a fleet maintenance shop, a dealership, or as an independent heavy-duty technician, this course will sharpen your troubleshooting skills and help you minimize vehicle downtime. You'll also receive a VieTech certification upon completion, showing your proficiency in our Aftertreatment emission systems diagnostics course. Stay ahead of evolving emission technologies and ensure your shop can handle Cummins-powered vehicles with confidence.
The free preview of this course includes an in-depth breakdown of the course content and expectations, a look at early training modules of the course, and a randomized 15-minute video snippet of training from the paid course. Begin the free preview now using the button above to start learning about Cummins Aftertreatment Emission System Diagnostics now!
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The Cummins Aftertreatment Emission Systems Diagnostics virtual classroom will be immediately available once you've purchased the course! You can begin learning how to diagnose problems based on diesel engine fault codes, operate within EPA regulations on emissions, and start getting certified now!
The Cummins aftertreatment system is designed to reduce diesel emissions using components like the Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), and Selective Catalytic Reduction (SCR) system. It treats exhaust gases after they leave the engine to meet emissions standards.
Yes. While dealer software like Cummins INSITE is ideal, there are reliable aftermarket scan tools that can read aftertreatment fault codes, perform forced regens, and monitor system performance.
Diagnosing Cummins aftertreatment faults involves reading fault codes, analyzing sensor data, and performing regen cycles. This course teaches step-by-step methods using industry tools and real-world scenarios.
VieTech’s course offers hands-on, real-world diesel training with a focus on Cummins emission system troubleshooting, not just theory. Join over 1,000 happy certified techs, and learn to diagnose, repair, and verify fixes with confidence.
This training will focus on EPA Heavy-Duty Diesel Engine emissions regulations and corresponding technology utilized by engine manufacturers to meet the requirements. The content delivered will directly relate to the developments, product changes, troubleshooting and service procedures surrounding current diesel engine aftertreatment emission control systems used across all major manufacturers. - Understanding of Diesel Engine Emission Control History & Technology Advances - Overview of EPA 2004 – 2016 tailpipe emission regulations - Overview of GHG CO2 emission regulations - Diesel exhaust gas recirculation (EGR) theory and operation - In-depth understanding of exhaust Aftertreatment components, theory and operation - Diesel Oxidation Catalyst (DOC) Diesel Particulate Filter (DPF) - Selective Catalytic Reduction (SCR) Catalyst - Diesel Exhaust Fluid (DEF) System HD OBD & Fault Troubleshooting Logic - Single Module Aftertreatment Systems - UL2 DEF Dosing System - Understanding of maintenance, troubleshooting techniques and diagnostic tests - Diagnosis of engine faults and symptoms using current troubleshooting software
To troubleshoot Cummins SCR system issues, check DEF fluid quality, inspect NOx sensors, and review fault codes using Cummins INSITE or similar diagnostic tools. Poor DEF dosing or sensor errors are often to blame. You will learn all of this, plus much, much more in this expert-led certification course.
