[e90julien]

Hey everyone, bought a 335d w 132k miles. Got a check engine light with bunch of minor stuff which I fixed but have 4 permanent trouble codes.
Heard lots if people say that the exhaust sensor also affects the low boost. Replaced that and nothing changed. I was checking up on some coolant stuff and noticed my egr to the exhaust manifold was loose. tightened those two torx up hoping it would fix some issue. Revs a little bit better at idle but is very sluggish till past 3k rpms .
Please Help Me out Cant find any further information on these codes


Codes
P0472 Exhaust Pressure Sensor "A" Circuit Low

P0471
Exhaust Pressure Sensor "A" Circuit Range/ Performance

P0299
Turbocharger/Supercharger "A"
Underboost Condition

P240F EGR Slow Response