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Question:

99 4 runner a/f sensor wiring diagram?

what wires connect from the vehicle to the a/f sensor

Answer:

Why do u want to know what wires go to the sensor? If you have a code for the a/f sensor..99 % of the time it is an open in the sensor itself. On rare occasion there are others like a chewed wire by a rodent. But I would just recommend replacing the a/f sensor. And i u were to follow the wires from the male connector they would lead you to a big wire harness that basically just all ends up at the ECU. Just in case u wanted to know.

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