EGR System
An EGR (Exhaust Gas Recirculation) System is an important emissions control device found in most modern vehicles. It helps reduce harmful exhaust emissions by redirecting a portion of the engine's exhaust gas back into the engine. Think of it like a recycling system for car exhaust. When mechanics mention EGR systems in their resumes, they're referring to their experience with diagnosing, repairing, or replacing these systems, which is an increasingly important skill as vehicles become more environmentally focused.
Examples in Resumes
Diagnosed and repaired EGR System failures on various domestic and import vehicles
Performed preventive maintenance on EGR Systems and related components
Led training sessions for junior mechanics on EGR troubleshooting techniques
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 with high NOx emissions and suspected EGR system failure?
Expected Answer: A senior technician should explain the step-by-step diagnostic process, including using diagnostic tools, checking for blockages, testing EGR valve operation, and verifying computer signals. They should also mention the importance of checking related systems that might affect EGR operation.
Q: What advanced diagnostic tools do you use for EGR system troubleshooting?
Expected Answer: Should describe experience with scan tools, smoke machines, back-pressure testers, and explain how these tools help identify specific EGR problems. Should also mention the importance of manufacturer-specific diagnostic procedures.
Mid Level Questions
Q: What are common EGR system failures you've encountered and how did you fix them?
Expected Answer: Should be able to discuss common issues like clogged EGR valves, failed sensors, and vacuum leaks, along with their typical repair procedures and preventive maintenance practices.
Q: How do you explain EGR system repairs to customers?
Expected Answer: Should demonstrate ability to explain technical issues in simple terms, discuss cost implications, and explain why repairs are necessary for vehicle performance and emissions compliance.
Junior Level Questions
Q: What is the basic function of an EGR system?
Expected Answer: Should be able to explain that the EGR system reduces emissions by recirculating exhaust gases back into the engine, and understand its basic components like the EGR valve and sensors.
Q: What safety procedures do you follow when working on EGR systems?
Expected Answer: Should mention basic safety practices like working with hot components, proper ventilation, and following manufacturer guidelines for system service.
Experience Level Indicators
Junior (0-2 years)
- Basic EGR component identification
- Simple diagnostic procedures
- Basic maintenance and cleaning
- Understanding of emissions systems
Mid (2-5 years)
- Complex diagnostics and troubleshooting
- Complete system repairs and replacements
- Understanding of related emission systems
- Computer diagnostic tool operation
Senior (5+ years)
- Advanced diagnostic techniques
- Training and supervision of other techs
- Complex system integration knowledge
- Emissions testing certification
Red Flags to Watch For
- No experience with diagnostic equipment
- Lack of emissions testing knowledge
- No understanding of computer-controlled systems
- Unable to explain basic EGR operation
- No experience with modern vehicles
