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:
Active Yaw Control (AYC)
This function helps maintain directional stability,
for example when cornering, by braking
one or more of the wheels if the vehicle shows
a tendency to skid or slide laterally.
This is one of D ...
Zoom
The camera can be useful when attaching a trailer. Press CAM to zoom in on the
trailer hitch (and press this button again to return to the normal camera view).
With the camera zoomed in on the trai ...
Summer and winter tires
The arrows shows the direction of rotation of the tire
• When switching between summer and
winter tires, mark the tires to indicate
where they were mounted on the car, e.g.,
LF = left front, ...
