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I was curious does the Oxygen sensor for the 05-09 mustang years use the back of the sensor to measure the outside air vs. the inside oxygen in the exhaust? I'm trying to figure if covering the back of the sensor will have the sensor give false reading and run at a high voltage which in turn will cause that bank to run rich. Is this the case or am I mistaken? I'm trying to troubleshoot my car and fix it once the issue is figured out
