My 2011 Corolla becomes sluggish after some time driving but picks up later

What is your question?

The car drives well until maybe an hr after it becomes sluggish. You accelerate but does not move more than 40km per hr . after some time it starts moving properly again. I scanned the car and it gave a P2770 error, what do i do?

What makes this problem better or worse?

when the engine is hot

How long has your 2011 Toyota Corolla had this problem?

one week