See also:

Emission inspection readiness
What is an Onboard Diagnostic System (OBD II)? OBD II is part of your vehicle's computerized engine management system. It stores diagnostic information about your vehicle's emission control ...

Using the infotainment system
If the infotainment system is on when the ignition is switched off, it will come on automatically the next time the ignition is put in mode I or higher and continue using the same source (FM1, ...

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 ...