986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Car running rich - smells of fuel while idelling. Any ideas?

Fluellen · 10-08-2010, 06:54 AM

Yes, looks like neither of the O2s is working. Even at idle your scan tool should report switching voltage; e.g. the O2 voltage should sweep between approx. 0.2V and 0.8V. O2 sensor output is not a percentage, it's a voltage between 0 and 1V.

So yes, something didn't go right when the O2s were changed...

10-08-2010, 06:54 AM	#4
Fluellen Doc Join Date: Jul 2010 Location: SoCal Posts: 69	Yes, looks like neither of the O2s is working. Even at idle your scan tool should report switching voltage; e.g. the O2 voltage should sweep between approx. 0.2V and 0.8V. O2 sensor output is not a percentage, it's a voltage between 0 and 1V. So yes, something didn't go right when the O2s were changed...