was replacing air filter and dropped one of the bolts in between air box and valve cover.

 

That should have a short hose to the turbo.

EDIT: It might be different on the Z54

 

looked around that area. There's no hoses that might connect to that part. I had to leave for work. So when I started the car, light was off. Is it possible that it cleared itself? Will have to drive for a day or two to see if it comes back.

 

Looking at the pics on ZZP's site, I can't tell what the 3rd port connects to(if anything).

On the stock K04, there is 1 port going to the wastegate, and the other 2 ports connect to ports on the turbo. You could contact ZZP to ask them if it's supposed to connect to something.

That port(on the Boost Control solenoid) is not very close to the area you were working on, though. If the code comes back, check the lines on the bypass solenoid(the one on the intake manifold).

Checking the bypass valve itself might be more challenging with your setup, as it appears to be below the BC solenoid, whereas the stock setup, it is above the BC solenoid. But that's a good suggestion by Firemangeorge.

 

Here is what Mitchell says to do:




P2261 is a Type B DTC

 

Quick update. So on my way back home, around 50 miles since it cleared itself, the check engine light came back. Stopped at auto store again. Sure enough it was p2261. I contacted zzp before posting here, and all they do, was asking me to bring the car in. Which I will have to do if I can't find the problem. Unfortunately it is 4 hours drive one way for me. I did some readings for the code, it gives too many possible problems. I am thinking removing BPV, and checking if it is not damaged. Maybe replacing it with my stock one. They look to be the same. Other than this not sure what to do.

 

Also I am thinking my battery might be getting weak. I've read before that dying battery can cause some strange problems. It has been very cold last several weeks in ohio.the reading on display is showing 14-14.2 at idle and driving. But when I shut the car it went down to 11.5 Will check what is the reading before starting tomorrow.

 

Found this at css, https://www.cobaltss.net/forums/how-...ml#post7042970

According to the author, the 3rd port on the BC solenoid is not used and can be left open.

So you're back to vacuum lines associated with the BPV and solenoid. And yes, definitely get the battery tested, it sounds like it may be headed south. Even if it's not the cause of this issue, you don't want to be stranded.

 

Thank you for the link. So it supposed to be left open. I surly wanna check the battery next. Does anyone with RPD display can let me know what are the voltage readings they have before starting the car and while it is idling. I never paid attention to that. 11.5 volts seems low, but not sure. Also I believe the battery is original. Bought the car in 2012, and never replaced it yet.

 

11.5 V is dead at 70F.