Last night when i was accelerating, the car just lost turbo power and didnt get any CEL. Then after I turned off the engine and turned it back on, got the CEL, without any idling issues.
The next morning, I scan the codes and get: p115c and p2b5c
I cleared them and restarted the engine to see if it came back. CEL didn't come back, but the car was idling extremely rough for 15 seconds until it stalled on its own.
Anybody know what's going on?

 

The code p115c is usually related to a intake hose leak some where. A leak somewhere between the turbo and the intake manifold seems the most likely.

The tube going to the intercooler can be loose and will cause your P2B5C code.
They both can be related to the same things.

Some times these can be even caused by an issues related to your valve cover and PCV system. Also have you checked your oil? Check that too.

Do you have a K&N oil style air filter? If so you might need to clean you MAF. This can cause the codes also.

Good luck. Keep us posted.