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You haven't said how old your car is... Old cars did indeed function as you describe with the AC compressor cycling on and off. It was either compressing, or it wasn't. You had to size the compressor for the worst case cooling need (i.e. relatively large) and when the compressor kicked in, it was quite noticeable (i.e. the engine would jerk as the ...


2

Short answer, yes - a faulty O2 can make the Check Engine Light / MIL to go on. Do you know what the code is?



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