2016 Forester XT 2.0
@Luann I had the same thing happen too, those three light, then replaced the brake light switch then two months later same three lights. took it to the dealership and this time it was the front o2 sensor. I believe this is what Subaru used to call "limp home mode". It disables the features related to the warning lights as well as cruise control and sport select mode(if installed). once I replaced the o2 sensor and reset the codes all was well. I'm sure it goes into that mode for a myriad of reasons just to protect systems from damage and to help assure you know you need to get it fixed asap. You can reset the codes but then subaru wont be able to tell you what is wrong with your car until it goes into that mode again.