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Catalyst System Bank 1 Low Efficiency and HO2S-11 (Bank 1 Sensor 1) Circuit Low Input Thanks in advance for any help given.
I switched coil pack and that did not correct it I also put a new spark plug in it, even though I put 4 new ones in back in May, and that did not correct the problem. Can some one give me some help on what might be causing this code? The engine is skipping a small amount(not bad) at idle. Thanks very much in advance.
Does the 2010 Equinox - 4 cylinder require a filter change when performing a transmission fluid change?