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Originally Posted by Crwms
I have this code on my 2000 v6 tacoma. I have changed the fule filter but code came back. My question is what is most likely to cause this and what side of the engine is bank 1?
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This code is related to the o2 sensor. There is usally another number which will tell you which sensor it is. Bank 1 (1) or (2). Sensor 1 is before the CAT and 2 is after the CAT. I ran in to the same issues on my 4Runner. You have to also check to see if it is you are running California emmissions, the sensors are different. Good luck.... It can be a pain in the butt.