I am in the process of wiring up my DC5 swapped EM2, and I came to a problem when wiring the O2 sensors. The O2 sensors have (2) gray (1) black and (1) white wire (coming from each O2 sensor), which one is which? (what wires are the heater + and - and what wires are sensor + and - )

 

uhh.....are both sensors that you have identical? cause they're not supposed to be.

 

The primary O2