Can you just arrive and see if the car will pass ? My grandson is looking to buy a car that the emissions expire on next month. He wants to see if it will pass before buying.

Well yes and no. If you reset the computer, their computers will know because it also wipes the emissions information that they use. Heres the standard rule set of what you should do: 1.) Make sure the check engine light isnt on (usually is a picture of a engine or the words "service engine soon") If your check engine light isnt on, you're good to go. 2.) If it is on, take it to a mechanic you trust 3.) After the mechanic fixes it, drive it around 50 to 100 miles in stop and go amd high traffic Notably, after step 2 it varies from car manufacturers though your common ones (Ford, Nissan, Chevy, dodge, etc.) should be covered

Good question I really don't know. Give them a call.

Take the car to a shop that will test and reset the engine control computer - some are free. The seller may let you do this - maybe not. Even if it fails, you are allowed a retest after emissions are mitigated.

Fastest way to pass through car computer cycles after reset is to run your car on idle for 3-4 minutes, after drive the car on streets around 40-45mph as steady as you can for about 10 minutes or longer. That worked for me. However, I would pay 10$ to do buyers inspection.