Why does the Honda City’s oxygen sensor fail, leading to increased emissions?

Home > Gari Forums > Honda Forums > Honda City Forums > Honda City Emissions Issues Forums

Why does the Honda City’s oxygen sensor fail, leading to increased emissions?

A faulty oxygen O2 sensor can cause incorrect air-fuel ratios, leading to higher fuel consumption and pollution. How can drivers identify and replace a failing O2 sensor?

Sirat Ul Jinan asked on 24 Feb 2025 17:12:35 pm

1 Answer

39 views |

Car Mechanic Expert - on 24 Feb 2025 17:17:40 pm

A faulty oxygen O2 sensor can cause incorrect air-fuel mixture, leading to poor fuel economy and higher emissions. Common reasons for failure include:

Carbon buildup.
Contamination from oil o r coolant.
Excessive heat o r vibration from the engine.

How to identify failure:

Check Engine Light CEL.
Poor fuel economy and performance.
Excessive emissions.

Solution: Replace the O2 sensor to restore proper air-fuel ratio and emissions control.