lexus rx 300 po171 code

Asked by o2man Jan 10, 2017 at 01:47 PM

Question type: Maintenance & Repair

po171 code keeps appearing after o2 sensor replaced - bank 1 to lean

1 Answer

F_O_R answered 7 years ago

I suspect you have two sensors on each side, one before and one after the cat. You may need to check or replace both of them.

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