99 rx 300 engine light /knock sensors

[Saunders lexus king]

Hi I'm Herman new to the group. I have a 99 rx 300 at 174,000 and I have a issue. My engine light is on cause I need to change the knock sensor, I brought 2 knock sensor from auto zone last week and put it in but still same problem. So should I call advanced auto parts and have them order a oem knock sensor would that work? Please comment below tryna to get it down buy this monday

[Spock66]

26 minutes ago, Saunders lexus king said:

My engine light is on cause I need to change the knock sensor, I brought 2 knock sensor from auto zone last week and put it in but still same problem.

How do you know it's a faulty sensor and not actually due to the engine knocking?

[PCM]

I guess the advice would be, read the stored codes...?