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Online Diesel Mechanic training

The online Diesel Mechanics & Heavy Truck Maintenance program covers basic diesel engine operations, troubleshooting and repair and more. The program helps you to prepare for the National Institute for Automotive Service Excellence (ASE) Certification Medium-Heavy Truck Tests. You can complete this program in as little as seven months, training online — at home or on the go — at a pace that’s right for you.

Diesel Mechanic Training Curriculum

Through our online Diesel Mechanic Training Program, you’ll cover topics that are designed to help you prepare to take the first steps toward a job in the field and sit for the ASE Medium-Heavy Truck certification exam. Your classes include:

  • Truck Electronics and Engine Control
  • Truck HVAC Systems
  • Truck Brake Systems
  • Troubleshooting and Repair

Learn more about curriculum, tuition, and enrollment requirements

Learn about:

  • Our affordable tuition payment plan options.
  • How online education works.
  • How a degree in API Program Name can help you reach your goals.


What you get

  • Fully interactive online lessons and study materials
  • Animated videos and interactives
  • Student Portal dashboard for instant access to online curriculum and support
  • Learning Resource Center online libraries and labs
  • ProQuest® digital access to thousands of sources for research
  • An active online community of fellow students, staff, and grads

job growth

Job opportunities

Diesel-related employment is on the rise. According to the U.S. Department of Labor, job growth for diesel service technicians and mechanics will be 4% between 2021 and 2031*. That's faster than the average growth for all jobs in the U.S. over the same time period, and job prospects should be best for those who have completed postsecondary training in diesel engine repair.


Unlike other online Diesel Mechanic courses, there are no prerequisites to enroll and you can graduate in as little as four months.


Learn heavy-vehicle repair procedures, tool usage and safety, and specialty systems such as hydraulics.


Our Diesel Mechanic training is easy on your wallet—and tuition includes what you need to get started.

Frequently asked questions

You may be taking your first steps into higher education. Or you may be considering online study for the first time. Whatever your situation, we're here to guide you through the process and answer any questions you have.

Our Diesel Mechanic training teaches you about vehicle electrical systems, the engine and its working parts, and more. Since diesel engines are in hundreds of thousands of buses, large trucks, boats, bulldozers, dump trucks, cranes, and more, people with this kind of specialized repair and maintenance knowledge should be in great demand.

All graduates keep access to their accounts on the Ashworth College Central Network, an online toolkit that provides step-by-step guidance through resume templates, cover letters, thank you letters, and more. As a student, you will interact with the Ashworth College Central Network throughout your lessons to make you comfortable with the tools and prepare you to make a good impression on potential employers once you've graduated!

We allow you up to one year from the date of your enrollment to graduate from the online Diesel Mechanic program. A self-paced, flexible study schedule is one of the many advantages of pursuing your education at Ashworth College.

Related programs

Ashworth College is the home of affordable, flexible, career-focused trades programs. In addition to our online Diesel Mechanic course, you may also be interested in:

State requirements

A career in this field may require you to meet certain licensing, training, and other requirements that can vary by vocation and state. You should check with your state, local government, and/or licensing board to find out which requirements may be applicable in your state. Click here for contact information on state licensing/regulatory boards and certain professional licensing information.

Advance your career in our online API Program Name program. Call 1-800-957-5412