The other responses to this post may be thinking of CA vehicles year 1999 and older which require tailpipe measurements and dyno loading. Newer vehicles usuall

The other responses to this post may be thinking of CA vehicles year 1999 and older which require tailpipe measurements and dyno loading. Newer vehicles usually only require the OBDII review and they will double check codes haven't been cleared recently and all sensors are in spec. No dyno or tailpipe measurements are required in CA on year 2000 and newer. This is why smog shops offer $20-$40 for year 2000 and newer and $70+ for 1999 and older. It's more human time intensive to test year 1999 and older.