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:
Location of the keyless drive antennas
Location of the keyless drive antennas
The keyless drive system has a number of
antennas located at various points in the vehicle.
1 On the tailgate, near the wiper motor
2 Left rear door handl ...
Ignition mode 0
- Insert the remote key in the ignition slot and
press it in as far as possible. ...
TEL menus
Main Bluetooth hands-free menu Phone menu
Call lists
All calls Missed calls Answered calls Dialed calls Call duration
Phone book
Search New contact Speed dials Receive vC ...
