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:
Glove compartment
Glove compartment
The glove compartment can only be locked
and unlocked using the detachable key blade
in the remote key. See page 61 for information
on removing the key blade from the remote ...
Horn
Horn
Press the steering wheel hub to sound the horn. ...
Gasoline containing alcohol and ethers, "Oxygenated fuels"
Some fuel suppliers sell gasoline containing
"oxygenates" which are usually alcohols or
ethers. In some areas, state or local laws
require that the service pump be marked indicating
...
