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International Automotive Technicians Network
Re: Fuel Trim Excursions
Posted to Emissions Forum on 4/1/2010

any way to get rear fuel trims??

in the VW world when the rear trims are maxed it will "hold" the front sensor and you can acctually see this "holding" it looks like a lazy front sensor on the scanner pid(it holds the front sensor signal to force it more ric... Login to read more.