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-   -   O2 Sensor Replacement Question- Post Cat (http://forums.pelicanparts.com/porsche-996-997-991-forum/654968-o2-sensor-replacement-question-post-cat.html)

motolz 01-31-2012 08:33 PM

O2 Sensor Replacement Question- Post Cat
 
I need to replace the O2 sensor on my 1999 996 Carrera. Two questions
1) Is there one or 2 post cat O2 sensors on the car? (are there two cats?)
2) any info on the replacement? I searched and can't seem to find any details. do I need to put it on a lift or can I get to it with jackstands. Any hints or ticks?

Codes are P1121 P0161. both seem to be related to post cat bank 2.

Thanks all. I appreciate the great feedback.


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