OBD-II
OBD-II (On-Board Diagnostics II) is a standardized system that helps automotive technicians identify problems in vehicles. Think of it as a car's built-in computer system that monitors how well everything is working. When something goes wrong, it creates error codes that mechanics can read using special tools. This system has been required in all cars sold in the United States since 1996. It's like having a translator that helps mechanics understand what the car is "saying" about its problems. Other names for this system include "On-Board Diagnostics," "OBD2," or simply "car diagnostic system."
Examples in Resumes
Performed vehicle diagnostics using OBD-II scanners on various vehicle makes and models
Interpreted OBD-II and OBD2 codes to diagnose complex engine and emissions problems
Trained junior mechanics in proper use of On-Board Diagnostics equipment and code interpretation
Typical job title: "Automotive Technicians"
Also try searching for:
Where to Find Automotive Technicians
Professional Organizations
Online Forums
Job Resources
Example Interview Questions
Senior Level Questions
Q: How would you diagnose a vehicle that shows multiple OBD-II codes at once?
Expected Answer: A senior technician should explain how they prioritize codes, understand relationships between different systems, and use a systematic approach to identify the root cause rather than just treating individual codes.
Q: Can you explain your experience training others in OBD-II diagnostics?
Expected Answer: Should demonstrate leadership skills and ability to teach complex diagnostic procedures to junior technicians, including proper scanner use and code interpretation methodology.
Mid Level Questions
Q: What steps do you take when dealing with an intermittent check engine light?
Expected Answer: Should describe how to use OBD-II freeze frame data, explain monitoring test results, and demonstrate knowledge of when to perform road tests versus stationary diagnostics.
Q: How do you handle emissions-related OBD-II codes?
Expected Answer: Should show understanding of emissions systems, common causes of failures, and proper testing procedures before replacing parts.
Junior Level Questions
Q: What does OBD-II stand for and what is its basic purpose?
Expected Answer: Should explain that it means On-Board Diagnostics II and that it's a standardized system for monitoring vehicle systems and reporting problems through diagnostic codes.
Q: How do you properly connect an OBD-II scanner and retrieve codes?
Expected Answer: Should be able to describe basic scanner connection procedures, locating the diagnostic port, and basic steps to retrieve and clear codes safely.
Experience Level Indicators
Junior (0-2 years)
- Basic OBD-II code reading and clearing
- Understanding common diagnostic trouble codes
- Basic scanner operation
- Simple diagnostics and repairs
Mid (2-5 years)
- Advanced diagnostic procedures
- Emissions system troubleshooting
- Multiple code interpretation
- Understanding sensor relationships
Senior (5+ years)
- Complex diagnostic problem solving
- Training and mentoring others
- Advanced emissions diagnostics
- Multiple vehicle platform expertise
Red Flags to Watch For
- Unable to explain basic OBD-II code structure
- No hands-on experience with diagnostic scanners
- Lack of knowledge about emissions systems
- No understanding of sensor relationships and system interactions
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