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N007

Montpelier, ID

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I start up my 2000 audi tt, when the outside temperature is around 20-30 degrees F, and the rpm meter moves to about 600 rpm's then jumps to about 1000, and does that reapetedly,(about every 2 seconds)until I drive it for a little while, then this occurs less often, until I start it up again in cold weather. I'm really curious to know if that means that my o2 sensor has failed or if my car's just getting old. It currently has 152000 miles on the odometer. If it may be something else, please inform me as well.


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