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International Automotive Technicians Network
fuel trim and O2
Posted to Technical Theory Forum on 3/3/2006 35 Replies

Hello folks,

After a driveablity class, I ran across this in the manual:

“ - - the feedback system is designed so that Fuel Trim drives the oxygen sensor, not the other way around. The HO2S signal only drives the Fuel Trim when STFT values do not cycle acr... Login to read more.

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