The 8,700 lb GVWR threshold is used to determine requirement for which test?

• A. OBDII functional test
• B. EGR functional test
• C. Idle speed test
• D. Emission leak test

Answer: (A)

The test category is tied to whether a vehicle uses OBD II for emissions verification. In California’s smog program, OBD II functional testing checks the vehicle’s onboard diagnostic system, readiness monitors, and MIL status to ensure faults would be detected and indicated. The 8,700 lb GVWR threshold separates vehicles that fall into the OBD II testing group from those that don’t, so vehicles at or below that weight require an OBD II functional test. The other tests—EGR functional, idle speed, and emission leak tests—are not determined by this GVWR cutoff and apply in different circumstances.