Do technical issues like faulty oxygen sensors, worn spark plugs, o r clogged air filters cause poor fuel economy in Changan Kalam?

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Do technical issues like faulty oxygen sensors, worn spark plugs, o r clogged air filters cause poor fuel economy in Changan Kalam?

Mechanics report such issues as common in vehicles with low mileage. Are these parts wearing out faster than expected?

Lubaba asked on 18 Jun 2025 16:37:55 pm

1 Answer

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Car Mechanic Expert - on 18 Jun 2025 16:41:55 pm

Yes — frequently reported.
Common mechanical issues affecting fuel average:

O2 sensor failure leads to wrong fuel-air mix

Worn-out spark plugs causes misfires

Choked air filters leads to rich fuel burn

These can occur even under 30,000 km mileage, especially if poor fuel is used o r servicing is irregular. Regular diagnostics and ECU scanning are recommended every 10,000 km.