TSB: Some 2018 ? 2021 model year RX 350 vehicles may exhibit a MIL ON condition with one or more of the following companion cylinder misfire Diagnostic Trouble Code (DTC) combinations:
?P030100 and P030400 (Cylinders 1 and 4 Misfires Detected).
?P030200 and P030500 (Cylinders 2 and 5 Misfires Detected).
?P030300 and P030600 (Cylinders 3 and 6 Misfires Detected).
One or more of the following ancillary DTCs may also be present:
?P030027 (Random/Multiple Cylinder Misfire Detected [Emission] Signal Rate of Change Above Threshold).
?P030085 (Random/Multiple Cylinder Misfire Detected [Over Temperature] Signal Above Allowable Range).
Follow the Repair Procedure in this bulletin to address this condition.
