My car has been acting like it has a mind of its own for the past ten days and I am getting tired of guessing. It is a 2015 Infiniti Q60 with about 91,000 km. One morning the engine light came on, and then two other small lights lit up with it. I turned the car off and on again, and everything went away. I thought okay, maybe it was a small glitch. But it came back three days later, and this time the car also felt a bit slow and the engine made a rough sound when I started it. Last night the lights came on again on the way home, and I felt a little worried because I was on the highway. My brother says it is just a bad sensor and I should clear the code and forget about it. My friend at work says that is a bad idea because the real problem stays hidden. I tried one of those cheap code readers from an online shop, and it showed a number, but when I searched it, I found five different meanings, so that did not help much. Then I read a page on to understand why lights can come and go, and it explained that a warning can show up because of many things, like a sensor, wiring, or a real problem that is just starting. That made me stop and think. I do not want to ignore it, but I also do not want to pay for parts I do not need. So I started looking for Expert Infiniti malfunction repair in ICAD, because it is close to my home and I want someone who has the right computer tools for this brand. I have some easy questions. Is it okay to drive the car when the lights come and go, or should I stop using it? Do those cheap code readers give the full story, or only part of it? How long does a proper check take, and do they charge for it even if they find nothing big? Also, has anyone had this and found it was only a loose cable or a dirty part? I would love to hear your stories. Thank you.