Jeep Cherokee 1990 Oxygen sensor

Oct 02, 2006 4 Replies
O

Just bought a new O2 sensor for my jeep. It is a 4.0L 1990.



It uses a 3-wire type sensor. 1 for signal and 2 for the heater.



Now, the sensor I got had the wrong plug. Excactly oposite of what i should bee. So in fact I could plug the new sensor into the old sensor :-)



Well, I needed the sensor i place for my emission test so I transplanted the old plug onto the new sensor. I know the wires to the heater ar in the right place because this could be tested measuring about 5 ohm over connector A and B.



My question then is what are the chances this is working correctly? Anybody know what jeep the sensor I got fits to? Just worried if the signal is different than it should be.



The original sensor had a female connector and the new one a male connector if I remember correctly



regards Odd-Inge Larsen


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O

BTW the new sensor looked like all metal and the old one had some sort of ceramic top like a spark plug.

regards Odd-Inge

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O

Checking on the net I found that the sensor I got most likly is for a four cylinder jeep Cherokee. There also is an image of a universal sensor on the page that fits both 6 cylinder and 4 cylinder jeep engine. But as I understand it there are two types of sensors, Titania and Zirconia and they are not interchangable. Hm....

regards Odd-Inge

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M

Your O2 sensor is under recall. You can get a new one installed for free if it hasn't already been done. We had our 88's done a few years ago.

I have heard bad things about the aftermarket sensors with the wrong plug. One thing is the insulation, you can't interfere with that or block it I think because the fresh air sample runs down it.

You also heard right that it (some are) is an odd ball sensor with power going to it.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail >
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