Why Is My Check Engine Light On in Marble Falls?
- Tyler Ellis
- Aug 18
- 2 min read
Few things cause more anxiety for drivers than seeing the check engine light pop up on the dashboard. While it can sometimes be triggered by a minor issue, it can also signal a serious problem that needs immediate attention. At Marble Falls Auto Center, we’ve helped countless drivers in the Hill Country quickly figure out what’s wrong — and get it fixed before it becomes a bigger, more expensive repair.
What Causes the Check Engine Light to Come On?
1. Loose or Damaged Gas CapA loose gas cap is one of the most common reasons the check engine light comes on. It can cause fuel vapors to leak, triggering your car’s emissions system warning.
2. Oxygen Sensor FailureYour vehicle’s oxygen sensors monitor exhaust gases to optimize fuel efficiency and reduce emissions. If they fail, you may notice poor gas mileage and increased emissions.
3. Catalytic Converter ProblemsThe catalytic converter helps reduce harmful exhaust emissions. If it’s clogged or damaged, your car may lose power, burn more fuel, and trigger the check engine light.
4. Faulty Ignition Coils or Spark PlugsWorn spark plugs or failing ignition coils can cause misfires, rough idling, and hard starts — all of which can turn on the check engine light.
5. Mass Airflow Sensor IssuesThe mass airflow sensor measures how much air enters the engine. A malfunction can cause performance issues and poor fuel economy.
How to Fix a Check Engine Light
The only way to know for sure is to have your vehicle’s onboard diagnostics (OBD-II) scanned. At Marble Falls Auto Center, we use professional diagnostic equipment to read the exact trouble codes and pinpoint the problem.
From there, we’ll explain what’s going on in plain language, give you repair options, and get your car back in shape — whether it’s a quick fix or a more in-depth repair.
Why You Shouldn’t Ignore It
Even if your car seems to be running fine, ignoring the check engine light can lead to more damage over time. Small issues can turn into major repairs if left unchecked.
Get Professional Check Engine Light Diagnostics in Marble Falls
If your check engine light is on, don’t wait. Schedule an appointment with Marble Falls Auto Center today and let our ASE-certified team diagnose and fix the problem before it gets worse.
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