Lexus A/F and O2

This bulletin applies to 2007-2010 Lexus ES350 and RX350 models. Some vehicles may exhibit a MIL on DTC P0138 and/or P0158 (oxygen sensor circuit high voltage bank 1 or 2). In some instances, a P2195 or P2197 (A/F sensor signal stuck lean) DTC may also be present.
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