Q: Loses power when reaches a certain speed limit sometimes it works sometimes it doesn't when it works cruise control works

asked by on October 26, 2016

I put the code tester up and it told me my O2 sensor was bad is that the cause I don't really know what causes my car to work when it does work but when it doesn't it loses power at 35 and it will put then it will go back to the 35 and does it again sometimes it does it at 45 mph as well

My car has 142000 miles.
My car has an automatic transmission.

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