Could a Failing O₂ Sensor Be Causing High Emissions and Poor Fuel Economy?

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Could a Failing O₂ Sensor Be Causing High Emissions and Poor Fuel Economy?

Ive noticed my fuel efficiency has ped, and a foul smell comes from the exhaust. My OBD-II scanner shows no definitive fault codes yet. Could a bad upstream o r downstream oxygen sensor be behind this—and ultimately lead to catalytic converter damage? How urgent is it to address in the Pakistani context?

Talha Kyanii asked on 30 Aug 2025 12:29:25 pm

0 Answers