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Old 02-01-2011, 12:55 PM
jpatterson12
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Default 2006 Altima 2.5S O2 Sensor Question

I recently got a SES with the code: P0420. I was able to get it diagnosed and they determined that it was the downstream bank 1 O2 sensor. After some research on my behalf, since the car is a 4 cylindar 2.5S, I think that there are only 2 sensors... One before the catalytic converter and one after. If that is the case, would they most likely be referring to the later?

Any help that you can provide would be fantastic, thanks in advance for your help.
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