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International Automotive Technicians Network
Re: Post cat fuel trim lean
Posted to Technical Discussion Forum on 2/11/2020 3 Replies

Nice find GW :O)

I like this part :O)

FAOSC (Rear Fuel Trim) Monitor As the front UEGO sensor ages and gets exposed to contaminants, it can develop a rich or lean bias in its transfer function. The rear bias control (also called FAOSC -- Fore/Aft Oxygen Se... Login to read more.

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