986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

gschotland · 06-12-2009, 01:02 PM

Looking through the PO's service recs I found "Replaced O2 sensor for Bank #1 ahead of TWC." Could find anything in this forum or in the Bentley manual. I did see TWC mentioned on another forum, but no explanation of what it is.

What is the TWC? I want replace the 3 other O2 sensors, so I need to know whether to buy 2 pre-cat & 1 post-cat or vice versa.

Thanks,

Gary
'02 S

06-12-2009, 01:02 PM	#1
gschotland Registered User Join Date: Apr 2006 Location: nj Posts: 389	What is TWC (RE Oxygen Sensor)? Looking through the PO's service recs I found "Replaced O2 sensor for Bank #1 ahead of TWC." Could find anything in this forum or in the Bentley manual. I did see TWC mentioned on another forum, but no explanation of what it is. What is the TWC? I want replace the 3 other O2 sensors, so I need to know whether to buy 2 pre-cat & 1 post-cat or vice versa. Thanks, Gary '02 S