How do states use OBD II for emission inspections?

How do states use OBD II for emission inspections? - Emission inspection readiness - Maintaining your car - Maintenance and specifications - Volvo XC60 Owners Manual - Volvo XC60

Many states connect a computer directly to a vehicle's OBD II system. The inspector can then read "faults." In some states, this type of inspection has replaced the tailpipe emission test.

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    Getting started
    Voice control button on the steering wheel ...

    Speed rati
    The speed ratings in the table translate as follow: Speed ratings M 81 mph (130 km/h) Q 100 mph (160 km/h) T 118 mph (190 km/h) H 130 mph (210 km/h) ...

    Dialing a number
    The system understands the digits zero to nine. These numbers can be spoken individually, in groups of several digits at a time, or the entire number can be given at once. Numbers above nine wi ...