Hiya, so like the title says I’ve been getting a P0299 code (turbocharger/ procharger underboost)
since installing a cold air intake. I installed the intake two days ago and today I sped up to make a light and then my CEL came on. After it came on the air flow sounded off and had a very weak turbo flutter as I shifted.

I was also messing around with a blow off valve spacer a little while ago but took it off because I didn’t like it.

i don’t know if I messed up installing the air intake or if I messed up the diverter valve or if I need new charge pipes or if my turbo is just done.

 

Your turbo maybe done, The good news is that you no longer need to put a new turbo. You can fix it in a minutes by using the turbo bend tool
www.turbobend.com
Good luck