I have a 4 wire o2 sensor and i just rewired it because i was getting a code 1 on a brand new sensor. the wires were lined up before like so:

blue/green---white
black---grey
black---white
white---black

i switched it to:

blue/green---grey
black---white
black---white
white---black

I went off the bosch's website that said "type c" white goes to black (signal), black goes to white (heater) and green goes to grey (ground). the way it was setup before may have worked with my obd1 ecu but now im back to obd2 and im getting a code 41 for the primary heater. so should i change it back to the original? thanks.