how many miles to drive before smog check

Plan to disconnect the battery long enough in advance to allow you to then drive your vehicle for at least 150 miles. When you reset a check engine light for inspection, you are checking to see if there is anything wrong with your car. How simple is that? So, how many miles to drive after resetting check engine light for inspection? We service all types of vehicles including European brands like Audi, Volkswagen, Mercedes, Texas requires smog checks to be performed, but not all counties carry the requirement. In case you reset your cars computer in order to pass an emissions test, there are a few consequences that you may face. 8. Consider driving your car for about 20 minutes on the freeway before taking the smog test. Doing this makes sure that the catalytic converter is If it drops significantly, this could be an indication that your car is not running as efficiently as it should be.