do not know much about that. I would refer to Chilton's and Haynes although sometimes they are useless too. I only cleaned my EGR passage. You should know however that after 120,000 miles of well maintained service my EGR passages had asphalt road tar looking crap and where completely clogged with black tar. I couldn't believe it. You have to clean it when you removed your TB. Use screwdrivers and dental picks and Berryman's and Seafoam and clean it as good as possible. Maybe your code will go away.
