Phase I of P0420 elimination finally complete - Saab Performance Bulletin Board - Saabnet.com
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Phase I of P0420 elimination finally complete
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Posted by MI-Roger [Email] (#882) [Profile/Gallery] (more from MI-Roger) on Sat, 29 Jan 2011 08:18:27 Share Post by Email
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To "Paul in NM" and others who may be wondering how the O2 adapter from Big Daddies Garage is working towards elination of a persistant P0420 CEL associated with my race cat after ~45,000 miles, I FINALLY got it installed this morning!

I initialy ordered the 90-degree model only to discover it cannot be threaded into the bung on my 9-5 with a GS downpipe without removing & re-installing the downpipe. This is due to interference with the left side jackshaft while threading it into the bung. I exchanged it for a straight style, which took longer than I expected, and by the time the new adapter arrived Winter had hit in full force delaying installation. I am a wimp, I don't like laying in snow in 10 degree weather working under a car dripping with road salt residue.

The straight style is no piece of cake to install either. I finally got it after threading the O2 adapter halfway into the bung, then threading the O2 sensor into the adapter, then tightening both while under the car. The rear engine mount is just enough in the way to make this tricky. Dropping the downpipe and using the more expensive angled adapter might be easier.

My P0420 problem has gotten to the point where I am receiving CELs once per week or more, which is one or more per 500 miles driven. I should know soon whether this $15 adapter is the trick I need. If not, Phase II is to have a new trailing piece made for my downpipe (the mostly straight piece of pipe that comes with the GS downpipe) with a monster truck sized Catalytic Converter welded into it and a O2 sensor extension cable purchased from the 9-3SS page of GenuineSaab's web site.

Keeping my fingers crossed.

posted by 98.250.156...

_______________________________________ Saabs owned: 2008 9-5 Aero Sedan, sold at 227K miles 2006 9-3SC 2.0T - Wife's daily driver 2000 Viggen Convertible - Sold May, 2022 1964 Quantum IV Formula Car - Retirement project 2000 9-5lpt Sedan, sold at 318K miles


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