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:
Electronic climate control, ECC
Electronic climate control, ECC
1 Temperature control, driver's side
2 Heated driver's seat*
3 Defroster (maximum effect)
4 Blower
5 Manual air distribution—floor
6 Manual air distribution—das ...
The radar sensor and its limitations
In addition to being used by ACC, the radar sensor is also used by Distance Alert
(see page 165) and Collision Warning with Full Auto-brake and Pedestrian Detection
(see page 173). This sensor is ...
Automatic car wash
• We do NOT recommend washing your car
in an automatic wash during the first few
months (because the paint will not have
hardened sufficiently).
• An automatic wash is a simple and quick
way ...
