I had a strange thought this evening when I brought the 95 disco home from getting the state inspection done today.

The Check Engine light is on, and it does idle a little funny, so I checked the codes and it points to the o2 sensor on the left bank. My concern is this. I have the 3.9 Gems engine and it looks like Atlantic British has a 2 wire o2 sensor for my truck. I went to check the truck this evening and it has 3 wire sensors on there right now.

Is this a problem? I just want to make sure that isn't my problem and I do order the correct sensor.

Thanks for the help. Other than that the truck is awesome. I am going to go through and complete the 60k service this weekend and get ready for the first off-road adventure.

 

I believe the 3rd wire is the heating element.

call the place who has the O2 sensors and ask them.

 

That is what I thought. Just wanted to double check. I found a couple of goofy things that were done to this truck before I got it, so I didn't want to chance it and waste time or money.

 

Check the wiring on it all the way up. See if the connector has been wired in. If it is ok, match whatever goes in the plug.