I was going through the vehicle customization menu for ES 300h, and saw under Automatic A/C System "Smog (Exhaust gas) Sensor Sensitivity", with settings -3 to +3. I'd like this to be as sensitive as possible to minimize the amount of smog that gets into the car, but can't figure out if -3 or +3 would accomplish this. Does anyone know what these numbers mean?

 

+3 would be most sensititve