Quote:
Originally Posted by particlewave
According to the Bentley, all 2000 and up have the precatalytic converters with pre and post O2 sensors.
I'm not up to speed on emissions, but I believe the sensors are required on 1 cat on each side. I don't see any on the rear cats, so maybe if you have them on the rear cats, they won't be on the precats?
This is definitely strange...
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My Boxster has 8 O2 Sensors, 4 per side. 1 before and after the manifold cat and 1 before and after the secondary cats.
I've read that people will put secondary cat delete pipes on the cars that don't have the O2 bung holes and they just tie the secondary O2 Sensors up out of the way and no CEL light from doing that. Not even sure what their function really is if you can tie them up and not throw a CEL.
My car
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