Does oxygen sensor affect fuel consumption?
Poor Fuel Economy
The oxygen sensor can affect how much fuel your vehicle's engine burns. By measuring oxygen levels in the exhaust, the O2 sensor helps to ensure your automobile meters and delivers the correct amount of fuel depending on the demands you place on the engine. Can a faulty oxygen sensor cause high fuel consumption? When these sensors fail to provide accurate information, the driver may experience increased fuel consumption, driveability problems, emission failures and other problems.