Maintenance 4 min read Published 2024-01-20
Understanding Your Check Engine Light
Learn what your check engine light means and what actions to take. Expert guide to common causes, severity levels, and when to seek professional help.
What Does Your Check Engine Light Mean?
The check engine light can signal various issues, from minor sensor malfunctions to serious engine problems. Understanding what it means can help you make informed decisions about repairs.
Common Causes
- Loose or faulty gas cap
- Oxygen sensor failure
- Catalytic converter issues
- Spark plug or ignition coil problems
- Mass airflow sensor malfunction
What to Do When the Light Comes On
- Check if there are any immediate performance issues
- Tighten or replace the gas cap
- Scan the error code with an OBD-II reader
- Consult a professional mechanic
Severity Levels
Solid Light
- Generally indicates a non-emergency issue
- Safe to continue driving but get checked soon
- Could affect fuel efficiency and emissions
Flashing Light
- Indicates a serious problem
- Stop driving as soon as safely possible
- Risk of severe engine damage if ignored
Prevention Tips
- Regular maintenance schedule
- Quality fuel and oil
- Address minor issues promptly
- Keep detailed service records
Written by David Wilson