u/General_Garbage_9919

Recently had my 2018 L5P T&D’d, and on the drive home I noticed a loud screech coming from the turbo area. The entire driver’s side of the engine bay is covered in soot. I’m double‑checking the installer’s work now. The downpipe is seated flat against the turbo, pedestal bolts are tight, but I’m still getting a P0299 under‑boost code.

At this point I’m assuming there’s a leak somewhere in the turbo/exhaust connection. I had the shop install the delete kit because I didn’t have time, but since this issue popped up, I’ll be taking over the troubleshooting myself.

If anyone has ideas on what else to check or common leak points on an L5P after a T&D, I’m all ears.