Knock Sensor Signal?? Options

[gt2nv]

I just git my o2 sensor fixed and my check engine light came on again and i get the code for the knock sensor signal. what does this mean?

[presure2]

if your getting a knock sensor code, you need to check it, its a sensor located on the back of the block, it detects "pre-igniton" or "detonation" (2 diffrent things, by the way) and the ECU uses it to help try and save the motor.
if you poped your knock sensor, i suspect somthing may be wrong with your FI system, causing you to run lean.
when was the last time you did a fuel filter? how many miles on the engine?

[Insanity-74]

"pre-igniton" or "detonation" (2 diffrent things, by the way)

Yes they are but 'PRE' detonation and pre ignition are the same thing, it's where the fuel is being ignited to soon by the heat of the cylinder instead of by the spark, cylinder can be running too hot for several reasons, one which is the most likely cause is that its running lean, another cause could bad cooling.

Give the engine a good service...oil, water etc, renew or clean the plugs, replace the fuel filter and reset the ECU, if its still throwing out an error code for knock then you can either get the car tuned to see whats causing the problem, or if you know how to, test the knock sensor to see if it is working OK, these things are hyper sensative and dont last forever.