The only other thing I would say is use a relay as the O2 sensor does draw power. I originally used the fuel pump enable wire (hot only with ign on) but it has the potential to draw too much power and throw a code. I had a fuel pump code and my car stalled after some back to back WOT testing runs. So instead, wire a relay and use that as the trigger wire with power directly from the battery.
Matthew
Is there an easy option for "key on power" under the hood. I don't want to remove my dash panel again. I have the relay and sensors wired in.
