I have the PO141 on my 2.4l Accord. I have replaced the bank 1 sensor 2 oxygen sensor, cleared the codes and fired it up. Codes come back in 30sec. So, I checked the plug and wiring and so forth, all looks good.

With the key in run or with the engine running, I checked the following.
The car side wiring harness plug of the O2 Sensor there is a white/black wire that is going to the heater. I checked the voltage on the wire going to the heater and have 13volts. There is a green wire that is ground to the heater, it is dead, no volts not grounded.

I plugged in the old O2 sensor to the harness and started up the car. The sensor did not heat up. I grounded the green wire with a jumper and then I could see the O2 Sensor turn red and of course burn my hand.

So, I am guessing the green wire back to the ECU is bad. Broke or whatever.

Short of pulling everything out of the car, how do I trace that back to the ECU.

 

What brand sensor did you put in

 

Desno