Oxygen sensor - 3 or 4 wire?

From: Andy Levy (andylevy@yahoo.com)
Date: Thu Jul 11 2002 - 20:20:21 EDT

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I'm going to replace my O2 sensor because A) I'm over 50K and B) my gas
mileage is in the crapper. I want to replace the upstream sensor
(pre-cat), right? The downstream I think is only used to monitor the
condition of the cat, as I recall.

Is this a 3-wire or 4-wire sensor? I can't tell from my glance at the
FSM and www.oxygensensors.com has both available for our trucks.

-- 
-andy
andylevy@yahoo.com
Maintainer, DML FAQ - http://www.dakota-truck.net/faq/
http://home.twcny.rr.com/andylevy/dakota/
'99 CC 4x4 318 auto

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