...lean the fuel mixture. If the sensor fails, then signal to lean the fuel mixture is not sent. Oxygen sensor is recommended to be replaced at 100,000 miles. From your description, replacing it should ...
...is number 1 - It sends a signal based on temperature and tells the Engine ECU to run Rich or Lean ( hey its 40 below outside - send the injectore more fuel / rich. I cooled this sensor with
...when o2 sensors and catalytic converters are going out your vehicle will start running really lean, you'll have poor gas mileage, sluggish performance and generally a p0300 or p01313-16 codes ...
saturn problems cylinders#1,3,5, miss fire bank #2 lean bad gas mileage what do I look for? Check the O2 sensor on bank 2. Pull codes to make sure before replacing sensors.
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