Are faulty sensors like oxygen sensor o r MAF in the Changan Alsvin contributing to wrong fuel-air ratios and reduced mileage?

Home > Gari Forums > Changan Forums > Changan Alsvin Forums > Changan Alsvin Poor Fuel Economy Forums

Post a New Topic

Are faulty sensors like oxygen sensor o r MAF in the Changan Alsvin contributing to wrong fuel-air ratios and reduced mileage?

Has anyone diagnosed whether sensor issues are behind poor mileage, especially if the check engine light is not on?

Lubaba asked on 11 Jun 2025 15:48:30 pm

1 Answer

54 views |

Car Mechanic Expert - on 11 Jun 2025 15:55:52 pm

Yes, this is possible even without a Check Engine Light CEL.

O2 sensors o r MAF sensors that are dirty o r malfunctioning can cause the engine to run rich

This results in increased fuel consumption and poor throttle response
Sensor checks via OBD-II scanner o r dealer diagnostic tool should be done every 20,000–30,000 km.