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Q: I have gotten codes 410, 130 & 133. Im told these are oyxgen sensors. on 2005 Chevrolet Trailblazer

I had one replaced post cat 02 sensor. But Im told there are 4 sensors, 2 in front & 2 in back. Now someone tells me its my air induction valve..which can cause rough idle and poor gas milege. Im confused what the heck is it?
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dont replace anything yet. code numbers never identify bad parts, just failed systems.

you need someone to diag the codes and find the exact failure. guessing is expensive and usually wrong

Who would you suggest that could do this, an emission control place? I'm not very trusting of car dealers repair shops.
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