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Yea I already posted the problem on the contour forum and they said that it shouldn't be the o2 sensors and it was most likely just that the MAF had to be cleaned, thats why I tried that first. The other things listed to check was vacuum leaks and injectors.
There is at least 3 o2 sensors in the car, possibly 4 so I would imagine that if one of those were bad there would have to be some sort of other code saying whether it was upstream or downstream....
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'04 Z71 Avalanche - Stock
'01 Suzuki SV650S - Stock
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