SOLVED: 02 SENSOR DIAGRAM FOR INSTALLATION - Fixya Jul 27, 2008How many o2 sensors are on ford fusion 08 3.0 liter? Autozone said five 02 sensors. Oxygen sensor wiring diagram for 02 nissan sentra. Nissan Cars & Trucks; Open Questions: 0 Answers can you safely bypass a knock sensor on Toyota v6 2002 Highlander and how. Jun 12, 2017 | 2002 Toyota Highlander. Diagnosing O2 Sensor Heater Circuit Failures | MOTOR The computer is looking for 12V on the sensor’s negative control wire while the computer’s O 2 sensor heater circuit driver (the power transistor in the computer) is open. With the wire being grounded, the O 2 sensor heater circuit came on as soon as the ignition switch was turned on. The computer control was bypassed at that point.