What To Do When Your Check Engine Light Comes On
It always seems to happen at the worst possible time—you’re cruising through Taylor, TX when suddenly your check engine light flicks on. Your stomach drops, and you wonder: Is it serious? Can I still drive? Do I need to fix it right away? Before beginning any of your summer travels, let’s get that check engine light inspected!
At Guzman Automotive, we’ve seen it all when it comes to checking engine lights. While the cause can range from a loose gas cap to a serious engine problem, one thing is always true: it’s your car’s way of asking for help. In this post, we’ll walk you through what to do when your check engine light comes on, what it could mean, and how we can help you figure it out—without the guesswork.
What the Check Engine Light Really Means
Your car’s check engine light is part of the On-Board Diagnostics (OBD-II) system. It turns on when your vehicle's computer detects a problem with the engine, transmission, or emissions system. This problem can be as minor as a faulty sensor or as major as a misfiring engine.
There are two types of warnings:
Solid light: Typically signals a non-urgent issue, like a sensor fault or loose gas cap. Safe to drive short distances, but schedule diagnostics soon.
Flashing light: This indicates a serious problem like an engine misfire that could damage your catalytic converter. Pull over and call for help.
Common Reasons the Check Engine Light Turns On
Here are the most frequent causes we see at our Taylor shop:
1. Loose or Damaged Gas Cap
It sounds simple, but a loose gas cap can trigger the light. If you’ve recently filled it out, check to make sure the cap is tight and click.
2. Faulty Oxygen Sensor
This sensor helps regulate the fuel-to-air ratio. When it fails, fuel efficiency drops, and emissions rise.
3. Bad Spark Plugs or Ignition Coil
Your engine can misfire without proper ignition, which impacts performance and long-term engine health.
4. Catalytic Converter Issues
This is a pricier fix, but it’s essential for reducing harmful emissions. Left unchecked, it can cause poor fuel economy and even total engine failure.
5. Mass Airflow Sensor Trouble
This sensor controls how much air mixes with your fuel. A bad sensor can cause stalling, rough idling, and more.
What To Do Right Away
The key is don’t ignore it—but also, don’t panic. Here’s your step-by-step plan:
Check your gas cap. If it’s loose, tighten it. The light may go off after a few drive cycles.
Note how your car is behaving. If you notice rough idling, sluggish acceleration, or strange noises, limit driving and call a pro.
Avoid hard and long driving. Don’t accelerate aggressively or tow heavy loads while the light is on.
Schedule a diagnostic check with a trusted local shop (like Guzman Automotive!).
Why DIY Code Readers Aren’t Enough
Auto parts stores may offer “free” code scans. This can be tempting, especially if you are trying to get on the road for a summer trip, but these only provide general codes—not the whole picture. For example, a code might say "cylinder misfire," but it won’t tell you why. Is it the spark plug? The coil? A fuel injector?
At Guzman Automotive, we go beyond the code with comprehensive diagnostics performed by ASE-certified technicians. Plus, we provide a Digital Vehicle Inspection (DVI)—with photos and videos—so you can clearly understand what’s happening under the hood.
How Guzman Automotive Can Help
Here’s what you get when you bring your vehicle to our family-run shop in Taylor, TX:
Same-day diagnostics on most vehicles
Clear communication—you’ll know exactly what needs attention and why
No pressure, no hidden fees
Repairs are only done with your full approval
Friendly service from real people (you might even meet a few Guzmans while you're here!)
Let’s Get That Light Taken Care Of—Together
Your check engine light doesn’t have to mean stress. With the right team behind you, it's just a quick step toward getting your car running right again. Don’t let a check engine light ruin your summer fun!
Schedule Your Diagnostic with Guzman Automotive Today
Or call us at 512.996.6950 for help now.