service engine soon light / knock sensor code

I have A 2001 SUB, and the sevice engine soon light comes on and i reset the codes and I always get the knock sensor code.Can anyone tell me if you
can check these knock sensor without taking them out.I know that they are located under the intake of my 5.7 engine.

thanks
sub2001

I have the same on my 2000 5.3L. says low input to the knock sensor... any ideas?
thanks

I also have the same problem on my 2000 5.3L! Had it before, but went away. Just replace the fuel pump, fuel filter, and injectors cleaned. Any help will be great. Just need to know how to test or what to do.

I also have the same problem on my 2000 5.3L! Had it before, but went away. Just replace the fuel pump, fuel filter, and injectors cleaned. Any help will be great. Just need to know how to test or what to do.

this is an old post start your own...when you do,,, get the DTC so that it can be correctly revealed what your problem is...

Sorry it took so long to repost. I wanted to let you all know what the deal was with the knock Sensors. I took in my truck agian after I had my truck in the shop after the Fuel pump, fuel filter and injectors cleaned the Check engine light came on. This time the dealer changed both knock sensors. The one on the rear bank was very corroded. He was telling me that the engine tilts toward the rear of the truck so if you wash your engine a lot then the water will sit toward the rear knock sensor and eventually eat it's way though the grommet. He replaced the sensors and put in RTV to prevent it from happening again. Hope this helps.