About This Course

This course is built to give technicians a solid working knowledge of modern aftertreatment emission systems - all while earning a certification upon completion. Whether you’re just starting out or need to sharpen your understanding, this training will equip you with the fundamentals to confidently service and diagnose aftertreatment-related issues.

You’ll cover the core components and operation of aftertreatment systems, including Diesel Particulate Filters (DPF), Diesel Oxidation Catalysts (DOC), Selective Catalytic Reduction (SCR), and more. The course also focuses on the importance of emission system maintenance, fault code interpretation, and a step-by-step approach to diagnosing low-power complaints and regeneration issues.

With lessons designed to apply across multiple manufacturers and industries, this course will help you approach aftertreatment systems with confidence, accuracy, and the skills needed to reduce costly downtime and avoid unnecessary part replacements.


What You Will Learn

  • Understanding Aftertreatment Systems

    Understand how modern diesel aftertreatment systems work, including Diesel Oxidation Catalysts (DOC), Diesel Particulate Filters (DPF), and Selective Catalytic Reduction (SCR) components. You’ll learn how these systems reduce harmful emissions and meet environmental regulations while maintaining optimal engine performance.

  • Diagnostics & Troubleshooting

    Learn how to interpret fault codes, recognize common emission-related issues, and apply structured troubleshooting steps. This course shows you how to diagnose low-power complaints, handle regeneration issues, and identify component failures accurately.

  • Maintenance & Management

    Learn the importance of proper maintenance, cleaning, and inspection procedures that prevent costly breakdowns and extend system life. You’ll explore best practices for handling sensitive components, maintaining system cleanliness, and following safe work methods.

Course Curriculum & Details

    1. Diesel Emission Control Overview

    1. Three Main Diesel Emissions

    2. Oxides of Nitrogen (NOx)

    3. Diesel Particulate Matter

    4. Carbon Dioxide (CO2)

    5. Quiz - Diesel Emissions

    1. Exhaust Gas Recirculation (EGR) Overview

    2. Exhaust Gas Recirculation (EGR) Theory & Operation

    3. Exhaust Gas Recirculation (EGR) Effects

    4. Exhaust Gas Recirculation (EGR) Cold vs Hot

    5. Quiz - EGR Systems

    1. Phase 1 Aftertreatment Introduction

    1. Overview (DOC DPF)

    2. DPF Primary Function

    3. DPF Secondary Function

    4. DPF Differential Pressure Sensor

    5. DOC Function

    6. DOC Fueling

    7. DPF Temperature Sensors

    8. Crankcase Breather Filter

    1. DPF Management

    2. DPF Operation

    3. Soot & ASH

    4. DPF Regen Lemp

    5. High Exhaust System Temperature (HEST) Lamp

    6. DOC / DPF Summary

About this course

  • $149.00
  • 73 lessons
  • 1 hour of video content
  • Certificate Available Upon Completion

Start Learning About Aftertreatment Emissions Systems Today!

Buy Now - $149

FAQ

  • Who is this course for?

    This course is designed for diesel technicians, fleet managers, and maintenance professionals who work with modern emission systems.

  • Do I need prior emissions system experience?

    No. The course starts with the basics and builds up to advanced concepts, making it ideal for both beginners and experienced technicians.

  • Will I earn a certificate?

    Yes. Upon completion, you’ll earn a digital certificate that confirms your training and can be added to your professional credentials.

  • Does this course focus on a specific manufacturer?

    No. The material applies to multiple manufacturers, providing a broad understanding relevant across various equipment and vehicles.

  • Can I take this course at my own pace?

    Yes. Purchasing this course gives you lifetime access to the contents and you can finish it as quickly or slowly as you want.

  • Will this course help me with regeneration-related issues?

    Absolutely. The course covers regeneration strategies, identifying failed regens, and managing soot and ash buildup effectively.

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