Side turn signal. Issue not with the camera housing.

Short answer: best to open a service ticket Long answer: Could be multiple things. My front left signal on my 2025 AWD started blinking faster than the right, and the car wouldn’t let me use FSD anymore. I tried diagnosing myself but couldn’t figure it out. Opened a service ticket and took it in, and they found that some wiring in the front left headlight had been corroded by water ingress. The headlight still worked, but the voltage was affected enough to throw an error in the computer. They replaced the wiring for free under warranty and it went back to normal.

I should correct this to say the wiring in question was *behind* the headlight, not *in* the headlight. So in my case, replacing the headlight would not have fixed it.