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DYI steps please - 97 Pathfinder Oxygen Sensor and Throtle Position Sensor

7257 Views 9 Replies 5 Participants Last post by  billhappy
Hello folks,
I have been getting a terrible gas millage on my 97 Pathfinder (12 MPG city), so I want do some maintainance. I am planning on replacing the plugs, front oxygen sensors and throtle position sensor (Which I know is bad). Alas, I have never done those, and would like to know.

So, can any of you nice folks point me to a step by step instruction on how to change my oxygen sensors, and if it is DYI-able, the throtle position sensors? Otherwise, what is a fair rate at the mechanic? (Autozone price O2 sensor - 60, TPS - 85).

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do the post-cat oxygen sensors effect mpg....or just the pre-cat?
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