rear o2 sensor needed to wideband tune??
yes this one...before the cat...so why my tuner said that???and this sensor is for tell a the ecm that the cat is doing is job or not???
o ok well no wonder I didnt know what you were talking about. I believe you need that one, but Im not very sure, Im sorry, I just know the one we have at the end is not needed.
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Turbo Johnny
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