While there are a few reasons your check engine light may be on, the good news is that, in most cases, the causes are minor and, therefore, easy to diagnose and fix.During an oil change, small ...

A failing oxygen sensor will usually trigger your car’s check engine light. The oxygen sensor (sometimes called an O2 sensor) measures the amount of unburnt oxygen in a car’s exhaust system.

If the sensor fails, becomes clogged, or if it gets a reading it’s not supposed to be getting, the faulty oxygen sensor will trigger your Check Engine light. 3. Other Emissions System Parts ...

If the sensor fails, becomes clogged, or if it gets a reading it’s not supposed to be getting, the faulty oxygen sensor will trigger your Check Engine light. 3. Other Emissions System Parts ...

Light sensors detect the presence or absence of light, and the intensity of that light. These sensors then convert light ...

Skipping the sensor reset can lead to glitches, with the check engine light illuminating as a result. Resetting the system — typically with a diagnostic scanner — resolves the issue. Signs to ...