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Okay i just have a Question ? Can a O2 sensor cause your car to bobb out sometimes , cus when my friend plugs up his (Primary) O2 sensor his car starts to bobbs out sometimes and idles funny sometimes. When it starts to bobb , he turns off the car then starts it up nd its goes away for a while . . im pretty sure it could be the wiring when they extended bcus wen he drives his car around wit the Primary O2 sensor unplug its drives fine and doesnt bobb or idles funny , . . Theres No CEL unless he unplugs the Primary O2 sensor . .
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