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Bad O2 sensor or O2 sensor not working properly

O2 sensor senses the concentration of oxygen in the exhaust gases and send signal to ECU to regulate Air fuel ratio.

If O2 sensor is bad or not working then it does not work effectively so air fuel ratio is not maintained. And it may create following causes.

  • Increased tailpipe emissions
  • Hesitation on acceleration
  • Increased fuel consumption
  • Rough idling
  • Stalling
  • And of course Sensor Light on dash indicates problem
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13y ago

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