a/f guage for 00-02 accents
its the black wire to hook up to send a signal to the guage, if anyone wants to know.
from the o2 sensor, before the relay, there are 4 wires, 2 whites, a gray, and a black, use the black one.
from the o2 sensor, before the relay, there are 4 wires, 2 whites, a gray, and a black, use the black one.



