2015 VW GTI
I have a 2015 GTI. Since getting it in 2017 (in warm months) it's told me the left tail light/brake light is out. Checked everything. Worked. Had the bulbs on both sides replaced anyway (sometime in 2017-2018). Even after doing so it still tells me the light is out. Now, it's telling me the right tail light/brake light is also out. Checked front, side and back and all my lights work on and off, signals and brake. Any idea what could be wrong and how to fix it?