1. Check the gas cap: Ensure that the gas cap is properly tightened. A loose or missing gas cap can cause the check engine light to come on.
2. Inspect the spark plugs and wires: Check the condition of the spark plugs and wires. If they are worn or damaged, replace them.
3. Clean the throttle body: A dirty throttle body can cause the check engine light to come on. Clean the throttle body using a throttle body cleaner.
4. Check the oxygen sensor: The oxygen sensor monitors the amount of oxygen in the exhaust. A faulty oxygen sensor can cause the check engine light to come on. Check the oxygen sensor and replace it if necessary.
5. Check the catalytic converter: The catalytic converter reduces harmful emissions from the exhaust. A faulty catalytic converter can cause the check engine light to come on. Check the catalytic converter and replace it if necessary.
Once you have fixed the underlying issue, the check engine light should turn off automatically. If the check engine light remains on, you may need to have your vehicle diagnosed by a mechanic.