HO2S Bank 1 Sensor 1/Bank 2 Sensor 1/Bank 1 Sensor 2

The scan tool displays 0-1132 mV. This represents the fuel control exhaust Oxygen Sensor (O2S) output voltage. The voltage should fluctuate constantly within a range between 10 millivolts and 1,000 mV, while operating in Closed Loop. Ten millivolts indicates a lean exhaust, and 1,000 mV indicates a rich exhaust.