2019 Porsche Macan — catalyst efficiency code but car drives normally — second opinion before I spend money

If it were in my driveway, move a coil or plug on the 2019 Porsche Macan if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. Write the result down so the next test isn't a repeat of the last one. If it repeats twice more I'll book time.

I wouldn't throw parts yet. Two 2019 Porsche Macans can feel identical and have different causes, so measure before you copy someone else's repair. If the cheap test changes it, stop and reassess. This is from a 2019 Porsche Macan in Long Island. Learned this the expensive way on a previous car. I keep a notes app thread for this now.