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Join Date: Aug 2013
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Bren Tune O2 Readiness won't set
I'm having a rough time figuring out how to get my O2 readiness to set on my 2006 M5 with a Bren tune. When I emailed Bren they said "there is no way to shut them off. We have 100+ cars running this same file without issue/problem". I've driven the car for 3 weeks/2,000 miles under a wide variety of conditions and can't get the O2 to set. This is a problem because I have the primary cats deleted but need 7 of 8 readiness codes to pass inspection so O2 readiness is mandatory. I've been driving on a rejected sticker and only have a few weeks left to get this resolved.
The car is running great otherwise with no codes so I'm at a loss to what the problem is. I have been monitoring the O2 sensors and they seem fine although one runs about 0.05 volts higher than the other at idle (0.080/0.130).
Any advice is appreciated!
Last edited by drZoom; 28th June 2016 at 06:55 PM.