No CEL but keep getting these codes and P1249. Also occasionally get a howling noise from the SAI pump on cold starts.
Guess it's time to pull and clean the pump.

 

forget the dtcs I had but howling SAI on cold start was toasted recirc ( blow off) valves for me.

 

+1, bad diverter valve(s)

 

Sounds like bad Diverter Valves, especially if they are honking.

 

DV's replaced.
It was a ooooooo noise and I could feel the viibration from the SAI. It was easy to pull. Some dirt came out and the hose wasn't connected.
Spent more time tying to find a dropped Allen wrench.

 

have you checked all the small vacuum lines? I just replaced DV's on a customer 6tt last week and the rubber connectors were literally crumbing...a vacuum leak from a vacuum hose will cause the same issue

 

I had the engine out last year and replaced all the rubbers. Then I did the DV the rubber hoses looked and felt good. I'll run the car a bit and see if the cleaned and properly connected SAI did it. I also had issues with TB to Y pipe boot popping off. Learnt I had to attach the boot to the y pipe first then TB. Now it stays on.

 

Finally fixed all the boost leaks getting 1.0 bar and no codes. Yippie.
I guess my ECU is tuned.
It still bucks a bit in first when starting off.