I had my check engine light come on today and using a generic scanner. I came back with these two codes

P0141
P0172

Im assuming it means the o2 sensor is bad, is that correct? if so, which sensor is it?

btw, I have a 97 v6 camaro

Thanks in advance for any help

 

P0141 = bank 1, sensor 2 (after the cat)
P0141 Chevrolet O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2 OBDII Engine Light Trouble Code | Engine-Codes.com


P0172 = bank 1 too rich
P0172 Chevrolet Fuel Trim System Rich Bank 1 OBDII Engine Light Trouble Code | Engine-Codes.com


Changing the upstream sensor will probably fix both codes, unless there is a wiring problem.

 

you might also have an exhaust leak (before the sensors)