You’re cruising through Randolph or Braintree on a warm summer day, enjoying the sunshine—then suddenly, your car’s check engine light pops on. It’s one of the most stressful moments for any driver. The light could signal anything from a loose gas cap to a serious engine issue.
At AXP Auto, we know how unsettling it is to see that light come on. That’s why our experienced technicians are here to explain what it means, what steps to take, and how to prevent long-term damage to your vehicle.
What Does the Check Engine Light Mean?
The check engine light is part of your vehicle’s onboard diagnostics system (OBD-II). When the light appears, it means the system has detected a problem affecting your engine’s performance or emissions system.
The issue could be minor or severe, but either way, it should never be ignored—especially during hot summer months when added stress on your engine can make small issues worse.
Common Reasons the Check Engine Light Turns On
Here are some of the most frequent causes we see at AXP Auto during the summer:
1. Loose or Damaged Gas Cap
It may sound simple, but a loose or broken gas cap can cause a vapor leak, triggering the light. Try tightening the cap and see if the light turns off after a few drives.
2. Faulty Oxygen Sensor
The oxygen sensor measures how much unburned oxygen is in your exhaust. A faulty sensor affects engine performance and fuel efficiency.
3. Failing Catalytic Converter
This vital emissions component reduces harmful gases. If it starts to fail, your vehicle may run hotter or produce odd smells.
4. Bad Spark Plugs or Ignition Coils
If your engine misfires, it can lead to poor performance and reduced fuel economy—especially noticeable in hot weather.
5. Mass Airflow Sensor Issues
This sensor measures air entering the engine. If it fails, it can throw off your air-fuel mix, triggering the light.
What to Do When the Check Engine Light Comes On
1. Don’t Panic
If the light is steady (not blinking), your car is likely safe to drive short distances—but you should get it checked soon.
2. Check the Gas Cap
Tighten it and see if the light goes off within a day or two. If not, the issue may be more complex.
3. Pay Attention to Other Symptoms
Is your car shaking, stalling, or making strange noises? A blinking check engine light or other symptoms mean you should pull over and call a professional.
4. Visit AXP Auto for a Diagnostic Check
Our ASE-certified technicians use advanced scan tools to read your car’s error codes and identify the problem quickly and accurately.
FAQs About the Check Engine Light
Q: Can I drive with the check engine light on?
A: If the light is steady and the car feels normal, you may be safe for short drives—but don’t delay getting it checked. If it’s flashing, stop driving and call for service immediately.
Q: How much does it cost to diagnose the issue?
A: At AXP Auto, we offer affordable diagnostics and will provide a clear estimate before performing any repairs.
Q: Will disconnecting the battery turn the light off?
A: It might—but that doesn’t fix the problem. The light will likely come back on until the underlying issue is resolved.
Trust AXP Auto for Check Engine Light Diagnostics in Randolph & Braintree, MA
A check engine light is never convenient, but it doesn’t have to ruin your summer. At AXP Auto, we provide fast, honest, and accurate diagnostic services to keep your car running smoothly and safely—no matter the season.
Schedule your appointment today at our Randolph or Braintree location and let us take the stress out of check engine warnings.