We've grown to fear the check engine light. It gives us a vague clue that something is wrong with the engine, and when it comes on we begin to panic. Will I be able to afford the repair? Is my car about to die on me? Let's shed a little light on the fearful check engine light.
The Purpose of the Check Engine Light
The check engine light is just there to signal there is a problem. It doesn't let you know what the problem is or how serious it is. It's just there to let you know it's time to take your car to a technician for a proper diagnosis.
What Does It Mean?
A flashing check engine light and a solid one have different meanings. If the light is flashing there is an immediate concern and you should find a safe place to pull over. You may need to get it towed to a shop. If the light is solid, it's likely to be a less serious problem, such as a loose gas cap.
Common Reasons Your Check Engine Light Is On
- The gas cap was left loose when refueling.
- Emissions-related sensors, such as oxygen sensors, have failed.
- Engine timing problems, most commonly with variable valve timing.
- Transmission failure codes.
- Engine misfire codes.
- Catalytic converter problems.
There are a dozen or more reasons for your check engine light to come on. The most important thing to do is to get it checked by a technician in a timely manner. This may help you to avoid more costly repairs down the road.