What is the bubbly noise coming from my engine when I press gas pedal? on 2005 Toyota Prius

My check engine light went on, I went to Toyota yesterday, they fixed the water valve, put pink cooloant in my car and now when I drive I hear bubbly noise when I press gas pedal, like water swashing.

Asked by for the 2005 Toyota Prius
take it back in. get a diagnostic run. if they messed up, call them on it. if they won't comply, take it to somebody who will.
Thank you