Hello all,
I have a 2008 chevy silverado. I have had problems with o2 sensors for a long while. I cant remember off hand what the code was but it was for the bank 1, sensor 2. It was the heater circuit. I have tried it all. I changed the o2, changed the harness for the o2. I checked for voltage and have it. I also ohmed out the wire from the o2 to the ecu ( to check for broken wires) all good. The last thing i could think of is a bad ecu. I wanted to get some opinions on this before i spend money on new ecu. Any help would be greatly app.

Richie