P2238 02 Sensor Positive Current Control Circuit low Bank 1 Sensor 1

I searched the forums but didn't find much. I had my engine & catalytic converter replaced over the weekend and after driving about 20 miles the check engine light popped on. I ran the scanner and it said p2238 so I'm wondering do I need to replace the sensor? Maybe check the wires first? Any advice? Car seems to be running fine.