How to diagnose O2 sensor's ecu side connector

[Bony_ahmed]

can anyone tell me the way to check the ecu side upstream o2 sensor connector ?

[2bz]

Buy a OBD2 reader. https://www.amazon.com/OBD2-Scanner-.../dp/B0743X5WV8

[Bony_ahmed]

i've checked with obd2 reader. O2 sensor bank 1 sensor 1 giving no value. I've installed a brand new denso sensor. The issue is maybe with the ecu side wiring, how to do that ? I've no experience in wiring