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:
Re-assembling the remote key
1. Press the remote key's cover into place.
2. Hold the remote key with the slot for the
key blade up.
3. Carefully slide the key blade into its groove.
4. Gently press the key blade in the groov ...
Hazard warning flashers
Hazard warning flashers
The four-way flasher should be used to indicate
that the vehicle has become a traffic hazard.
To activate the flashers, press the triangular
button in the center dash. ...
