Is poor fuel quality in Pakistan affecting the performance of oxygen O2 and knock sensors in Changan Kalam?

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Is poor fuel quality in Pakistan affecting the performance of oxygen O2 and knock sensors in Changan Kalam?

Low-octane o r contaminated petrol may alter combustion behavior, confusing sensors. Is this leading to wrong fuel-air readings and poor mileage?

Zarnish asked on 25 Jun 2025 17:51:19 pm

1 Answer

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Car Mechanic Expert - on 25 Jun 2025 17:54:48 pm

Absolutely.

Low-octane o r adulterated petrol causes:

Incomplete combustion

Excess carbon deposits

Misfire-like conditions

These confuse O2 and knock sensors, triggering CEL and degrading fuel economy.

➡️ This is more severe in rural towns with unregulated fuel pumps.