So tonight, on my 2004 4runner 4.0L, I got a CEL. Had codes read and cleared afterwords. 02 sensor, bank 2 sensor 2. So rear sensor drivers side I think, I know it is the rear sensor. I will drive and see if the CEL comes back on. So far so good. I priced the sensors, and DAMM. as much as over 400 each for front and over $125 each for rears. What do yall think about the cheep sensors ? I know how the sensors work (front to rear) and the front adjust fuel trim, and rear compare 02 levels to insure cats are working. I also know that it is not good to change just one sensor, as they all work together.
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