So I've had my check engine light on for a while and i just now Got around to checking it and its code 31 (knock sensor) so I looked at the back ot my block and I don't even have one installed. So i kept looking and i found 3 plugs that are not connected one of which is taped to the harness . One of them has to be knock sensor but I'm not sure which one. And the other 2 I have no clue Wth they are for. Here's a pic . Any ideas??????

 

The one that is taped is under the one on the right.

 

its that 2 wire grey plug.

 

Nice thanks man. Since were on the subject of knock sensors I read some forum and a dude said the 2g knock sensor was better than the 1g. Any truth in this? If so is it possible for me to use it in my 1g and how?

 

2g knock sensor is only better for a 1g if you have phantom knock issues.

 

Is it a direct fit? Just plug and play? I'd rather have a 2g and not experience any phantom knock issues at all

 

yes it is the same connector and same thread. it doesn't have that crappy black goo that 1g sensors have either.

 

the two knock sensors do not read the same. the 2g is less sensitive. if you use it in a 1g the ecu wouldnt know if you were getting knock.
in short its a bad idea unless you know how to tune and engine for no knock withouit relying on knock feedback in the first place.

 

i wasn't gonna bother going into detail lol. but yes jerry is correct.

 

Well I git a knock sensor but I'm still getting a check engine light. I checked the plug and the ground is getting continuity and but the positive is only getting 5.84 volts. Anty suggestions?