Audi O2 Wiring Diagram. Most of the time the check engine light will come on. Power door locks.
23 t4k 4 pin connector black near front bumper 3 ground strap engine to body 12 ground connection in engine compartment left 44 ground connection lower left a pillar. 02 sensors wiring diagram i am replacing my upstream 02. All i can say is the black is the signal wire on.
Audi o2 sensor wiring a wiring diagram usually gives information about the relative position and arrangement of devices and terminals on the devices to help in building or servicing the device.
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