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.
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Changing coolant
Normally, the coolant does not need to be
changed. If the system must be drained, consult
a trained and qualified Volvo service technician.
Do not top off with water only. This reduces the
rust- ...
News - City Safety
City Safety is a new function, sensing if vehicles ahead are moving slower or
standing still. By measuring the car's speed and distance to the vehicle ahead,
City Safety is able to calculate the b ...
Child restraint systems
Child restraints
Infant seat
There are three main types of child restraint
systems: infant seats, convertible seats, and
booster cushions. They are classified according
to the child's age an ...
