World Class Journey: T1 Gasoline Engines and T2 Diesel Engines

Transitioning to the fleet side, prepping for truck certifications, or simply attempting to level up your engine diagnostics requires moving past real-world shortcuts. You have to learn how to operate in "Service Manual Land."

In this episode of the World Class Journey series, Motor Age Technical Editor Noah Nelson breaks down his personal prep strategy for taking on the ASE T1 (Gasoline Engines) and ASE T2 (Diesel Engines) certification tests. Whether you are facing complex 12V DC networks, computerized engine control faults, or variable geometry turbo (VGT) air-management issues, navigating these exams takes a logical diagnostic approach.

About the Presenter

Noah Nelson is the Technical Editor for Motor Age Magazine. As an ASE Master Certified Automotive Technician (A1–A9) with 25 years of hands-on industry experience, Noah specializes in advanced electrical systems, vehicle communication networks, and physics-based diagnostic workflows. He is currently documenting his pursuit of the prestigious ASE/AutoCare Association World Class Technician status.