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Join Date: May 2010
Location: Atlanta Georgia
Posts: 40
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.

Last edited by motolz; 02-02-2012 at 02:06 PM.. Reason: Added Codes
Old 01-31-2012, 08:33 PM
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996 , o2 sensor , replacement

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