Check engine light on 2006 Toyota Rav4

Good grief, another case of "Auto Zone" deceptive and false diagnostic testing. Please, everyone reading this, stop thinking you can take your vehicle to a parts store and figure out what is wrong with your car by retrieving diagnostic trouble codes alone. These stores offer this free service BECAUSE IT HELPS THEM SELL PARTS. Often times...most often...they are parts you DO NOT NEED. You've just wasted time and money and probably are causing further issues by continuing to drive your vehicle. There is no "free lunch". You do indeed get what you pay for. AND, furthermore, there is no diagnostic trouble code for any vehicle anywhere in world for "FAULTY BANK 1 SENSOR 2 O2 SENSOR". Diagnostic trouble codes will tell you what is happening -- lean codes, out of range codes, inconsistent codes -- but no "this part is bad" code. Your next step is to seek professional guidance from someone who makes a living as an expert in diagnosing and repairing vehicles. Think of the money and time you've already wasted, and consider stopping the wastefulness. Here are some shops near you to try: https://repairpal.com/repair-shops/toyota-repair-and-service-in-hanover-massachusetts