2000 9-3 with 90500 miles - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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2000 9-3 with 90500 miles
Posted by Dean [Email] (more from Dean) on Wed, 22 Jun 2005 07:49:32
In Reply to: P0171 Follow Up, Paul Morgan, Wed, 22 Jun 2005 06:47:53
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This code is for a situation where the O2 sensor says lean and the adaption has exceeded norms while compensating for this. There was more airflow through the MAF than the MAF signal indicated. The system had increased fuel, but obviously from the running problems, was not achieving a decent AF ratio.
This type of problem is what has cracked/busted pistons on Viggens and 9-5 Aero's. The block can be damaged by the failed piston. The trionic will try to enrich, but that will not work, and retard ignition. With the higher output engines, things progress to a more critical state, perhaps with the higher boost pressures that these engines have.
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