Toyota Repair: 99 Solara SLE Engine Light On - O2 Sensor, cleaning fuel injectors, o2 sensors

Question
I had Auto Zone run a diagnostic and it came up as an O2 Sensor problem. All I notice right now is a slight loss of power. Will a fuel injector cleaner help, or something else? I don't know the repair history as I just bought the car three months ago.

Thanks!


Answer
Since this is an SLE model it must be a V-6 engine, there are three O2 sensors on this engine, the most common failure is either the bank 1, sensor 1, or bank 2 sensor 1, the sensor that has failed needs to be replaced, cleaning fuel injectors or adding fuel additives won't help so don't waste your money on that, you need to find out which O2 sensor is the problem and have it replaced.