check engine light = knock sensor code help

[tothemax]

just yesterday my knock sensor code went off i cleared it. i reall havent noticed any difference in my car what is a knock sensor for should i worry?

[bpomps]

i might be wrong but it has something to do with telling the TCM or ECU maybe when to shift ? or works with it or something.

[tothemax]

i see what your saying but my car is a 5 speed manual

[allensteiner]

the knock sensor adjusts ignition timing to avoid knocking, pinging and detonation. if you're using fuel lower than premium grade that might be the reason for it going out. a lot of times the ks code will pop up when your o2 sensors take a dump, which doesn't mean the ks is bad. was that the only code you had?

[tothemax]

yea that was the only code i kno what you mean with the O2 sensor cause i replace them it awhile back cause it also threw bank one to lean. this was only knock sensor since i reset the code the check engine light hasnt come onquestion i used premium fuel for 2 fill ups just to clean out my valves and stufff then switched back could that be the reason

[allensteiner]

yep, premium is recommended for a reason. using it from time to time doesn't clean anything off.