This Knock noise gave me code P1326 Hyundai sonata 2014

My car starting showing flashing check engine light and lost power especially when trying to accelerate in a traffic light or stop sign or in a hill, I put the scanner reader and showed code p1326 and it was saying THE KNOCK SENSOR PERFORMANCE AND I THOUGHT I was the sensor that it was damage but after relaxing the sensor was still doing the same thing ..but my engine had like a knocking and rating noise ..probably engine about to go bad