Help with my 96 240sx

[TwinTurboByrd]

The check engine light came on in my car, I ran the codes and came back with a knock sensor code. The light went off after a week or so, I ran the codes and it had stored it. The car has significantly less power now. Any pointers, or ideas? The car is all stock. Thanks!

[USMCgetsome]

replace it!

[Rekless KA]

Replace it is the correct thing to do.

the knock sensor is there for your safety, when there is a "knock" from probably timing, combustion before spark perhaps on your car, it retards the timing so you dont detonate the engine! or you just have a bad sensor that thinks thats the problem.