I got the engine code P0125 on my Toyota Corolla 2000, where is the Oxygen Sensor?

Question

I got the engine code P0125 on my Toyota Corolla 2000; how can I fix the code? Where is the Oxygen Sensor?

Answer 1

p0125 is for bank 1 sensor1 oxygen sensor on the exhaust manifold before the catalytic converter which most likely needs to be replaced if there is no wiring issue

see picture below

Answer 2

P0125 TOYOTA Code - Insufficient Coolant Temperature for Closed Loop Fuel Control
Read more: https://www.autocodes.com/p0125_toyota.html