Engine code P2A00 O2 sensor Bank 1 Sensor 1 - Cadillac Forum - Enthusiast forums for Cadillac Owners

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Old 07-01-2018, 12:26 PM
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Default Engine code P2A00 O2 sensor Bank 1 Sensor 1

Engine code P2A00 O2 sensor Bank 1 Sensor 1
I replaced the O2 sensor, code went away but came back the next day. Autozone write up states most likely faulty wiring at engine harness. I checked the connectors and all seem clean and good. Anyone have any ideas where to look? bad ground? where?
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