Learn OBD-II
2 expert-rated courses covering OBD-II. Compared by rating, price, difficulty, and job relevance so you can pick the right one.
OBD-II expertise is in high demand across the automotive, heavy equipment, and transportation industries. Certified OBD-II technicians can expect a 10-15% salary premium over non-certified peers, with the global OBD market projected to grow at over 7% CAGR through 2026.
Key Facts About OBD-II
- 1OBD-II was mandated for all light-duty vehicles sold in the United States starting in 1996.
- 2The OBD-II standard defines a common set of diagnostic trouble codes (DTCs) that can be read by any OBD-II-compliant scan tool.
- 3OBD-II systems can monitor over 1000 different parameters related to a vehicle's performance and emissions.
- 4Accessing OBD-II data requires a dedicated scan tool or adapter that connects the vehicle's OBD-II port to a computer, smartphone, or tablet.
- 5Popular OBD-II scan tools include the Autel MaxiCOM MK908, Innova 3100j, and BlueDriver Bluetooth Professional OBDII Scan Tool.
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Top OBD-II Courses

Auto Mechanic Fundamentals: Engine to Exhaust
Gain the technical expertise and professional knowledge needed to excel in this comprehensive course. Automotive repair course covering engine systems, transmission, brakes, suspension, electrical diagnostics, and preventive maintenance procedures. Features code-compliant techniques, material selection guides, and troubleshooting strategies you can apply immediately on the job.

Diesel Engine Maintenance and Repair
Master the hands-on skills that power America's infrastructure in this practical, project-driven course. Diesel mechanics course covering fuel injection systems, turbocharging, emission controls, cooling systems, and heavy equipment engine overhaul procedures. Designed to prepare you for licensing exams and immediate employment - with the practical skills that set journeymen apart from apprentices.
Pro Tips for Learning OBD-II
- #1Start with a solid foundation in automotive mechanics and electrical systems before learning OBD-II.
- #2Practice interpreting OBD-II trouble codes and data across a wide range of vehicle makes and models.
- #3Stay up-to-date on the latest OBD-II standards and diagnostic tools through ongoing professional development.
Why Learn OBD-II?
- Become a more effective auto mechanic by quickly diagnosing and troubleshooting complex vehicle issues using OBD-II data.
- Gain a competitive edge in the job market as an OBD-II certified technician, with access to higher-paying roles.
- Build a profitable side hustle offering OBD-II diagnostics and repair services to local vehicle owners.