My turbo doesnt kick in at any point, it sounds to be struggling & instead of a whistling it makes a scratching noise (metal on metal sound). Someone said i may have seized the main bearing? Blue smoke billows out of the tail pipe. I parked the car and havent drove it since. But i had to drive it home once the noise started. It got worse and worse and eventually stopped. But the turbo seemed to be gone entirely. The check engine light and "traction control light" stay on along with a flashing of the cruise control light. Everything is under factory warantee so im not worried. Just want some answers.