If you have the QuitColdTurkey buff, and your sim smokes again, you get the SmokingHabit buff again and a FellOffTheWagon buff, and you'll have to start the quitting process all over again. After that, you get a QuitColdTurkey buff, and life goes back to normal.
You will have do other things to keep your sims Fun motive up until the quitting process is complete, which takes 15 sim days. You will then get the NeedCigarette buff, but you can't smoke again.
To quit the smoking habit, You must let the SmokedCigarette buff run out. If SmokedCigarette buff is allowed to end while having a smoking habit, Fun motive will be greatly reduced, and Stressed, FeelingAnxious, Strained, and NeedCigarette buffs are added. Smoking has a chance of developing a smoking habit(sim will get SmokingHabit buff). Twallans Master controller mod Master controller integration mod (will add extra. Twallans Master controller mod will add many sliders and also adds a range hack.I set my range to 4.You can do this by clicking on City hall and changing your settings from there. It adds SmokedCigarette and FeelingCalm buffs and increases Fun motive. Here is a list of the sliders and mods I use to create my sims. Smoking a cigarette removes Stressed, BuzzCrashed, FeelingAnxious, and Strained buffs.