[Patroclus]

Hey there. Ive got a situation Id like some help with. My car has been in perpetual limp mode for the last week. No CEL on dash. I scanned it with protool and get
2C57 and 3876. Ive noticed slow acceleration, loud on startup, no PSSH from blow off valve, and low boost in protools. Cant get above 3 psi of boost on wot

I removed all my pipes up to the charge pipe to make sure theres no issues. Charge pipe is aluminum after cracking when i got the car tuned 5 years ago.

Im including some logs when i drove to work today and my error code log. Any advice would be appreciated. Thank you

PS: Dont worry, low beam and wheel sensors are being taken care of

https://drive.google.com/drive/folde...PDcuRlVeSSgwUk

[whyzee125]

Do you have stock DVs? I had one of my stock DVs pop out on a previous e90 and it was just like you describe. Loud, a tiny bit of boost and no CEL.

[Patroclus]

Sorry im not sure what a DV is. I googled it and came up with diverter valve?

[whyzee125]

Originally Posted by Patroclus

Sorry im not sure what a DV is. I googled it and came up with diverter valve?

Yes

[Patroclus]

So the issue ended up being the boost solenoid. easy replacement, car back to normal
part # 11747626351

as far as the louder than usual exhaust, my exhaust clamp coincidentally finally gave out from rust and caused an exhaust leak. new clamp fixed it

[Misery]

Could be boost solenoid, bad vacuum lines or a intercooler pipe pop off