Sup guys, my car threw a CEL the other day and it shortyl went away after, then 3 days later which was yesterday it came back. I got the code pulled today and it said NO SIGNAL TO KNOCK SENSOR. We checked the connections and everything seemed fine. My mech. said its most likely that the knock sensor went bad and ill need a new one. Has anyone else had this problem from the knock sensor? Also does a CEL affect performance at all?

 

if the problem went away, and then came back it could also be a bad wire in your harness.

I know on b series engine a knock sensor code would put your car in safe mode and limit your rpms to something like 3000.

 

^^^Thanks man, im gonna try and get this fixed under warranty.

 

The knock sensor is under the intake manifold. It can be easily broken when accessing the starter.

Has the transmission been removed recently?

 

Actually the starter was changed about 3 weeks ago. So that could be it?

 

I'd say so. You need to use an extension to access the upper starter bolt, and it goes through right where the knock sensor is. They could have pried against it while snapping the bolt loose or tightening it.

 

I'd bet the sensor is cracked from removing the starter. They are pretty fragile.

 

^^thanks guys!

 

can anyone show me a picture of exactly where its located or detail description? I had my clutch change-out and i have this code

 

The empty bolt hole in the middle of the block, above the thermostat housing.