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My stft seem to be in normal range, but there are two different ones that are further down in between the o2 readings one is stft b1 S2 at 99 steady and another stft b2 s2 at 99 steady. What do these mean? Is it fuel effiecincy?
Same problem here. (Sensors 1 ok.) Sensors 2 99.2% steady. Does it mean cats on way out?