P0155 code, change o2 sensor engine ligh still on
can somebody tell me what's wrong with my car , I got a code P0155 for the bank 2 sensor 1 heater problem , I got a brand new sensor already and install it to the bank 2 sensor 1. I mismatch the signal wire to ground ..then I switch it back, i"m not sure if that affect anything?
Out of the 4 wires, 2 of them goes in to the ECU , one is the 0-1v signal wire..what's the other one for? Heater 12v ? heater Ground? does it sense current or Voltage? because I want to see what's wrong with it... because it's a new sensor..what could go wrong?