Catalytic converter problems

Catalytic converter: Equipment in the exhaust system that transforms the contaminant gases radiated by the car.
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Transmission issues

Chevrolet Aveo 2005 Manual 238000 miles
When I'm driving in 3rd or 4th gear and the speed is accelerating, the car bucks and jerks. And it does the same if in low gear and the rpms go under 2000. Mainly in 2nd gear. I know I have bad oxygen sensor and catalytic converter.
Monkey from United States 8 years ago  
MO
4 reports 
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