Catalytic converter problems

Catalytic converter: Equipment in the exhaust system that transforms the contaminant gases radiated by the car.
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Car vibrates horrible

Nissan March 2014 Hr12 110000 miles
Vehicle vibrates and it's giving a p0138 cord I changed the catalytic and the O2 sensor but the check engine light comes back with the code. My rmp is at 0 when idle.
Shawn from United States 8 months ago  
SH
4 reports 
Franco from other a month ago
U probably have a vacuum leak
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