I'm having a little problem with my gs theres this weird noise coming out of the manifold i believe i don't exactly know where is coming from but the little giggle is weir and it only comes at high RPM and is having me the codes P0115 AND P0141 CAN SOME HELP ME? I WILL APPRECIATED.

 

I'm having a little problem with my gs theres this weird noise coming out of the manifold i believe i don't exactly know where is coming from but the little giggle is weir and it only comes at high RPM and is having me the codes P0115 AND P0141 CAN SOME HELP ME? I WILL APPRECIATED.

 

The reason for your B1S2 code could be due to this leak you're hearing, use a section of garden hose to find out where the source of the leak is (One side to your ear, the other to where you think the leak might be), as for the other code, replace your coolant temp sensor?