What To Do If the Check Engine Light Comes On

While the check engine light is often a sign that your vehicle needs some attention, it doesn’t always mean you need to pull over right away. In most cases, it's safe to drive for a few days before getting it checked out. However, if you see lights like the oil pressure or low tire warning, those require immediate action. So what could actually be causing that check engine light?

1. A Loose Gas Cap

One of the most common reasons for the check engine light to come on is a loose or faulty gas cap. When the cap isn't properly sealed, fuel vapors can escape, which triggers the onboard diagnostic system. This issue is simple to fix—just make sure your gas cap is tightened securely. If it's damaged or cracked, replacing it is an easy and affordable solution.

After tightening or replacing the cap, the light should usually reset itself after about 20 minutes of driving. If it doesn’t, there might be something more going on with your car.

2. Potential Mechanical Issues

If the light remains on after checking the gas cap, it may indicate a more serious problem. Here are some common issues that could trigger the check engine light:

• Oxygen Sensor: This sensor helps monitor the amount of unburned oxygen in your exhaust. A faulty one can reduce fuel efficiency and damage your catalytic converter over time.
• Catalytic Converter: This part reduces harmful emissions. If it's failing, you might notice reduced power, poor fuel economy, or even difficulty passing emissions tests.
• Mass Airflow Sensor: This component measures the air entering your engine. A dirty or faulty sensor can lead to poor performance and increased fuel consumption.
• Spark Plugs and Wires: Worn-out spark plugs can cause misfires, decreased power, and lower fuel efficiency. They can also lead to damage in other parts of the engine over time.
• Cracked Gas Cap: Even if you can tighten it, a cracked cap can still let fuel vapors escape, affecting your car’s performance and gas mileage.

If you're not sure what's causing the issue, it's best to have a professional mechanic run a diagnostic test.

3. Get a Professional Diagnosis

A qualified mechanic can connect a scan tool to your car's onboard computer to read the specific trouble code. This will help identify the exact issue, whether it's a minor sensor problem or something more complex. Don't try to guess—getting a proper diagnosis saves time, money, and potential future repairs.

If your check engine light has come on recently, don’t hesitate. Contact DaSilva’s Auto Body today to schedule a diagnostic appointment. Our experienced team is here to help keep your car running smoothly and safely.

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