Are malfunctioning oxygen sensors O2 sensors o r mass air flow sensors a cause of emissions issues in Changan Karvaan across Pakistan?

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Are malfunctioning oxygen sensors O2 sensors o r mass air flow sensors a cause of emissions issues in Changan Karvaan across Pakistan?

Faulty sensors disrupt the air-fuel ratio, increasing exhaust pollutants. Are dusty environments damaging these components prematurely?

Sandeep asked on 26 Jun 2025 15:56:30 pm

1 Answer

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Car Mechanic Expert - on 26 Jun 2025 16:06:42 pm

Yes. These sensors are critical for managing air-fuel ratios. Problems arise due to:

Dusty conditions common in Pakistan clogging o r damaging MAF/O2 sensors.

Sensor aging, especially after 40,000–60,000 km.

Faulty sensors cause fuel-rich combustion, leading to black smoke and poor mileage.

⛔ Conclusion: Malfunctioning sensors are a common but often overlooked cause of emissions issues, worsened by Pakistan’s dusty and harsh driving environment.