I am trying to figure which sensor is (bank 1, sensor 1), and whether it is an air/fuel ratio sensor, or an oxygen sensor. I have called Autozone, the local Toyota dealer, small Autoparts stores, and they all give me different answers. Here are some pics:
Which sensor is this?
And which sensor is this?
And, is there another sensor after the catalytic converter? If so, which is it?
So far I have replaced the spark plugs, tested for vacuum leaks, cleaned the MAF sensor, cleaned the Fuel Injectors, Cleaned the Throttle Body, and still the CEL comes back on after about 250 miles of driving after resetting it.
Does anyone have an answer to my questions or some guidance here?
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