I got a b16a1 in my 90 teg. I get a cel randomly about once every month. I checked the codes and its always either 1, 23, or 21. The latest was 21. I know the 23 and probably the 1 is from loose connectors but the 23 has me stumped. All i know is one time i hit a nasty bump and that light came on.

So my question is:

Is it possible to get cel 23 (knock sensor) if you hit a really bad bump in your lowered car? Like can it jar the engine hard enough to fool the sensor into thinking your engine knocked?

Thanks guys.

 

all the knock sensor is, is a sensitivite microphone. im sure its possible to have this happen but ive never heard of it before

 

how well are your engine mounts/bushings holding up? could be that the impact from the bump could is not being asborbed as much.

 

i had a problem with my car throwing a code 23 it was always when i hit a bump or something. turns out my wire that had been run for the knock had some of the plastic covering worn away near the ecu. so when i would hit the bump or the whatever would cause it to show up, it was just the wire gounding out. i guess what im saying is check the back and front of your wires.

keith

 

i checked the wires and they are secure. My motor mounts are extremely stiff poly filled.