How do states use OBD II for emission inspections?

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.
See also:
Child safety locks
Child safety locks – rear doors
The controls are located on the rear door jambs. Use the remote control's key
blade or a screwdriver to adjust these controls.
A The rear doors can only be op ...
Warranty
As you'd expect, the Volvo V50 Sportswagon is supported by a comprehensive
warranty. The standard mechanical warranty is three years/60,000 miles
(whichever comes first), plus there's a three-year ...
Cargo area
Positions
NOTE
Please consult a Volvo retailer’s Parts department for the most up-to-date specifications. ...
