Why does the Check Engine Light turn on due to O2 sensor issues in the Tucson?

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Why does the Check Engine Light turn on due to O2 sensor issues in the Tucson?

Some Tucson drivers experience frequent “Check Engine” lights, often traced back to faulty oxygen O2 sensors. Is this a manufacturing fault o r caused by soot buildup from poor combustion? How common is O2 sensor failure in Pakistan, and is it easy to replace o r clean locally?

Gari Specialist asked on 13 Jun 2025 17:46:11 pm

1 Answer

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Gari Master - on 13 Jun 2025 17:49:41 pm

The Check Engine Light CEL turns on in your Hyundai Tucson due to O2 oxygen sensor issues because the sensor detects abnormal oxygen levels in the exhaust, indicating the engine’s air-fuel mixture is off. The O2 sensor monitors how efficiently fuel is burned and sends this data to the engine control unit ECU. If the sensor is faulty o r gives inaccurate readings, the ECU can’t properly adjust the fuel mixture, leading to higher emissions and poor performance. To alert you of this problem, the CEL illuminates so you can get the sensor checked o r replaced promptly.