What to do when your check engine light comes on
Mathew Flack • October 14, 2024
What to do when your check engine light comes on
What to Do When Your Check Engine Light Comes On:
The sudden illumination of the check engine light can send a shiver down the spine of any driver. It’s one of those moments that brings uncertainty. Is it something minor, like a loose gas cap, or does it point to a serious issue like engine misfire? In this blog, we’ll break down everything you need to know about what to do when that dreaded light pops up on your dashboard.
1. Don’t Panic, But Don’t Ignore It Either
When the check engine light comes on, your first instinct might be to panic. It’s important to remain calm. Most of the time, the issue isn't catastrophic. However, ignoring the light can lead to more significant problems down the line. Here’s a step-by-step process to follow:
2. Check for Immediate Problems: Is Your Car Behaving Differently?
Once the light comes on, pay attention to how your vehicle is running:
- Power Loss: Do you notice a decrease in engine power? Is the car hesitating or stalling?
- Odd Noises or Vibrations: Listen for strange sounds such as knocking or pinging.
- Flashing vs. Steady Light: If the light is flashing, it typically signals a more serious problem (e.g., misfire, which can damage your catalytic converter). A steady light usually means it’s something less urgent but still important to address.
If your car is behaving normally, you can continue driving cautiously, but you'll need to address the issue soon. If there are noticeable changes in how the vehicle performs, it’s best to stop driving and call for assistance.
3. Check the Gas Cap: The Simple Fix
Believe it or not, one of the most common causes of a check engine light is a loose or damaged gas cap. The gas cap seals the fuel system and maintains pressure, so when it’s loose, the system detects a leak.
- What to Do: Safely pull over, tighten the gas cap, and wait. It may take a few drives for the system to reset and for the light to turn off. If it does, problem solved!
- If the Light Stays On: After tightening the gas cap, if the light remains on for several trips, you might have a different issue on your hands.
4. Visit a Professional or Get an OBD-II Scan
If the gas cap doesn’t resolve the issue, it’s time for a deeper investigation. All modern vehicles (since 1996) come equipped with an Onboard Diagnostics System (OBD-II). This system generates error codes when the check engine light comes on.
- What Happens at the Mechanic: A mechanic will use a more comprehensive diagnostic tool to identify the issue and recommend a repair. This is the best course of action if you’re unsure about the severity of the problem.
5. Understand Common Causes for the Check Engine Light
Once the error code is retrieved, the professional can determine the specific issue. While many things can trigger the light, here are some of the most common reasons:
- Oxygen Sensor Failure: This sensor measures the amount of unburned oxygen in your exhaust and sends data to the car’s computer. If faulty, your engine may burn too much fuel, leading to poor gas mileage.
- Mass Airflow Sensor Issue: This sensor calculates the amount of air entering the engine. If it’s malfunctioning, it can affect fuel efficiency and engine performance.
- Spark Plug or Ignition Coil Problems: Worn-out spark plugs can cause misfires, while ignition coils may fail over time, leading to rough engine operation.
- Catalytic Converter Problems: A damaged catalytic converter may trigger the check engine light. This is a more expensive repair and requires attention.
- Exhaust Gas Recirculation Valve: This component helps reduce emissions, but it can get clogged or malfunction, causing the light to come on.
- Vacuum Leak: Your car’s engine relies on a vacuum system to perform various tasks. A leak could lead to performance issues and may trigger the light.
- Battery or Alternator Issues: Problems with your car’s electrical system can also trigger the light, especially if voltage is irregular.
6. Consult a Mechanic for Repairs
After identifying the issue using an OBD-II scanner, you will need a professional to carry out the necessary repairs. It's important not to delay this process, especially if the issue involves critical engine components. A mechanic will have the tools and experience to address the problem safely and effectively.
7. Resetting the Check Engine Light
After the professional has fixed the underlying issue, the light should turn off on its own after a few drives. If it remains illuminated, your mechanic can reset the light for you.
- Keep in mind that if the problem persists, the light will return, which may indicate a deeper problem requiring further attention.
8. Regular Maintenance: The Best Prevention
One of the best ways to prevent the check engine light from coming on is to stay on top of your vehicle’s maintenance schedule. Regular oil changes, air filter replacements, and inspections of key engine components can help you avoid many of the issues that trigger the check engine light.
- Schedule Regular Tune-Ups: A tune-up can help detect potential issues before they become serious problems.
- Keep an Eye on Fluid Levels: Ensure that your oil, coolant, and other fluids are topped off and free of contaminants.
- Use Quality Parts and Fuel: Sometimes, poor-quality gasoline or aftermarket parts can lead to performance issues. Sticking to quality products can minimize risks.
9. When the Check Engine Light Turns Off By Itself
In some cases, the check engine light may come on and then turn off by itself after a short time. This can happen if the issue that triggered the light resolves on its own. For example, a minor misfire or brief sensor glitch may clear up without intervention.
- Still Check the Code: Even if the light goes off, it’s a good idea to scan your car for stored codes. This will help you understand if there’s an underlying issue that could return.
10. When to Worry: Red Flags
While many check engine light causes are minor, certain symptoms indicate a more severe problem. Seek immediate attention if you notice:
- A Flashing Light: As mentioned earlier, a flashing check engine light indicates a serious issue, such as an engine misfire, which can damage your catalytic converter.
- Smoke or Burning Smell: If you see smoke coming from the hood or notice a burning smell, stop driving immediately and call for help.
- Overheating: An overheating engine can cause significant damage. Pull over safely and turn off the engine.
Conclusion: Act, Don’t Ignore
The check engine light is your car’s way of telling you that something isn’t right. While it might not always point to an urgent issue, ignoring it can lead to costly repairs or damage. By taking the right steps—checking for obvious problems, visiting a professional, and consulting a mechanic when necessary—you can ensure that your car remains in good working order and avoid unexpected breakdowns.
Remember, a well-maintained car is not only safer but also more fuel-efficient and reliable. Keep an eye on that dashboard, and when the light comes on, act promptly!
Keep Your Cadillac at Its Best: Expert Service and Repairs in Universal City, TX Your Cadillac isn’t just transportation-it’s a statement of comfort, performance, and craftsmanship. To keep it running smoothly for years to come, regular maintenance and expert repairs are key. At Victory Lane Automotive, we specialize in European and luxury vehicle care, including full-service maintenance and repairs for Cadillac models of all kinds. Why Cadillac Maintenance Matters Every Cadillac is engineered with precision and advanced technology. Regular maintenance ensures all of those systems-from the powerful engine to the advanced suspension-work as intended. When maintenance is skipped or delayed, small issues can quickly turn into expensive repairs. Key benefits of staying on top of your Cadillac’s maintenance include: Longer vehicle life – Regular oil changes, inspections, and fluid flushes prevent wear and tear. Better performance – Keep your Cadillac’s acceleration, handling, and braking as smooth as the day you bought it. Improved safety – Faulty brakes, worn tires, or electrical issues can put you and your passengers at risk. Higher resale value – A well-maintained Cadillac holds its value much better than one with spotty service records. Common Cadillac Services We Offer At Victory Lane Automotive, our ASE-certified technicians use the latest diagnostic tools and high-quality parts to ensure your Cadillac gets dealership-level care-without the dealership price tag. Some of our Cadillac repair and maintenance services include: Engine Diagnostics & Repairs – From warning lights to performance issues, we’ll pinpoint and fix the cause. Transmission Services – Expert repairs and maintenance for smooth shifting and reliability. Brake Service & Replacement – Precision brake work for dependable stopping power. Suspension & Steering Repairs – Keep your Cadillac’s ride comfort and control in top shape. Electrical System Repairs – We handle everything from battery testing to complex electrical troubleshooting. Air Conditioning Service – Stay cool and comfortable year-round. Preventative Maintenance – Routine inspections, fluid changes, and tune-ups designed to prevent costly breakdowns. Luxury Service You Can Trust We know your Cadillac deserves special care. That’s why our shop offers: 3-Year / 36,000-Mile Nationwide Warranty Courtesy Shuttle & Loaner Vehicles Friendly, Family-Owned Service You Can Count On Schedule Your Cadillac Service Today Whether you drive an Escalade, XT5 , or CT6 , you can trust Victory Lane Automotive to keep your Cadillac running in peak condition. Preventative maintenance today means fewer headaches tomorrow. 📍 Visit us at 264 Kitty Hawk Rd, Universal City, TX 📞 Call us today or schedule your appointment online!
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Expert Brake Repair and Rotor Replacement in Universal City, TX When it comes to keeping your car safe, your brake system is one area you never want to overlook. Whether you’re taking a quick drive around Universal City or heading out on a Texas road trip, reliable brakes are what stand between you and a potential accident. But how do you know when it’s time for service—and why is it so important to stay on top of it? What Your Brake System Really Does Your brakes are more than just a pedal and a few pads—they’re a complex system that converts the energy of a moving vehicle into heat to slow you down safely. Here’s what’s happening every time you hit the brake pedal: 1. Hydraulic pressure pushes brake fluid through your lines. 2. Brake calipers clamp down on the rotors. 3. Brake pads create friction against the spinning rotors, slowing your wheels. Over time, that friction wears down both the pads and rotors. Once they thin out or warp, your braking performance can drop fast—and that’s when trouble begins. What Happens If You Wait Too Long Ignoring worn brakes can lead to: • Increased stopping distance – making it harder to stop quickly in an emergency. • Grinding or metal-on-metal contact – which can destroy your rotors and skyrocket repair costs. • Vibration and steering issues – caused by uneven rotor wear. • Brake fade – when your brakes overheat and lose effectiveness, especially on long downhill drives. A small brake issue today can easily turn into a big (and expensive) one tomorrow. Common Warning Signs Watch for these everyday indicators that your brakes need attention: • A squealing, scraping, or grinding noise when braking • A soft or spongy pedal feel • Pulling to one side while braking • A burning smell after heavy braking • The brake warning light glowing on your dash If you notice any of these signs, it’s time to have your system checked by a certified technician. Brake Pads vs. Rotors: What’s the Difference? • Brake Pads: These are the components that wear out the fastest. They’re designed to create friction but will eventually get thin and lose stopping power. • Rotors: These metal discs can develop grooves or warping over time. When that happens, you might feel shaking or vibration in your steering wheel during braking. Replacing both when needed ensures smooth, quiet, and safe performance. Why Local Drivers Trust Victory Lane Automotive At Victory Lane Automotive, we take brake safety seriously. Our ASE-certified technicians perform complete brake inspections, pad and rotor replacements, and fluid flushes using top-quality parts. We service all makes and models—and stand behind our work with a 3-year/36,000-mile warranty. Need to stay on the go? We offer loaner cars and a courtesy shuttle, so you never miss a beat while we keep your brakes in peak condition.
Auto Repairs Made Easy with Flexible Financing at Victory Lane Automotive At Victory Lane Automotive, we know that unexpected car repairs don’t always come at the best time. Whether it’s a transmission issue, brake replacement, or a sudden check engine light, the cost can sometimes feel overwhelming. That’s why we offer flexible financing options to help you get back on the road without added stress. Our goal is simple: provide you with exceptional service, peace of mind, and solutions that fit your budget. When you choose Victory Lane, you also benefit from: • 3-Year / 36,000-Mile Nationwide Warranty – Confidence that your repairs are covered long after you leave our shop. • Loaner Vehicles & Courtesy Shuttle – Keep your day moving while we take care of your car. • Exceptional Customer Service – Friendly, professional, and always here to make the repair process simple and transparent. And when it comes to covering those larger repairs or even everyday vehicle expenses, our financing options have you covered. ____________________________________________________________________________________________________________________ Our Financing Options Synchrony Financing Use the Synchrony Car Care Credit Card for everything from major repairs to everyday vehicle needs like gas, auto insurance, parking, car washes, and even rideshares. Accepted at thousands of locations nationwide, Synchrony makes financing simple. Benefits include: • Easy application process • Immediate purchasing power • Instant credit decisions • No annual fee • Stress-free financing with low monthly payments • 24/7 online account management ____________________________________________________________________________________________________________________ Snap Financing Perfect for customers with any type of credit history—even if you’ve gone through bankruptcy. Snap Finance offers an easy lease-to-own process designed to get you approved quickly and conveniently. Why Snap Finance? • Works with all credit types • Hassle-free, fast approval process • Payment plans that align with your payday schedule • Early payoff options to save money ____________________________________________________________________________________________________________________ EasyPay Finance Looking for transparent financing with flexible terms? EasyPay Finance is a great solution. Highlights include: • 90-Day Finance Charge Cap Promotion – Keep finance charges capped at just $40 if you pay off your balance within 90 days and meet simple requirements. • Flexible payment options tailored to your needs • Simple and straightforward application process ___________________________________________________________________________________________________________________ Drive with Confidence At Victory Lane Automotive, we believe that car repairs should never keep you from moving forward. With our trusted warranty, helpful loaner and shuttle services, and multiple financing options, you can feel confident knowing we’ve got your back. Don’t wait until repairs become overwhelming—visit us today and ask about financing options that work for you!
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Is Your Car Trying to Tell You Something? When to Get a Computer Diagnostic If your check engine light just came on—or worse, it’s flashing—your car is trying to communicate with you. Modern vehicles are equipped with advanced computers that monitor everything from the engine to the transmission, fuel system, and emissions. When something isn’t working properly, your car will let you know. The fastest way to find the issue? A computer diagnostic scan. At Victory Lane Automotive in Universal City, we specialize in pinpointing problems quickly and accurately with advanced diagnostic tools. As a highly rated local mechanic near you, we’re here to help you catch small issues before they turn into big, costly repairs. Top Signs It’s Time for a Car Diagnostic Here are the most common warning signs that it’s time to bring your car in for a diagnostic check: Check Engine Light On – A steady light means a minor issue, but a flashing light signals a serious problem that requires immediate attention. Loss of Power or Sluggish Performance – If your vehicle struggles to accelerate or feels weak, your engine may not be running efficiently. Rough Idling, Stalling, or Hard Restarts – Uneven running or unexpected stalls often point to engine misfires or fuel delivery issues. Poor Gas Mileage – If you’re filling up more often, diagnostics can reveal issues in your fuel system or sensors. Strange Smells or Noises – Burning odors, chemical smells, knocking, or hissing sounds should never be ignored. Overheating – Warning lights, steam from the hood, or a high temperature gauge mean your car needs attention immediately. If you notice any of these, it’s time to search “auto repair near me”—and trust that Victory Lane Automotive is your answer. Why Diagnostics Matter A quick code scan at a parts store only tells part of the story. The truth is, a diagnostic trouble code doesn’t equal a full diagnosis—it just points to the system where the problem lies. At Victory Lane Automotive, our ASE-certified technicians go beyond reading codes. We trace the root cause of the issue so you don’t waste money on unnecessary parts or temporary fixes. Why Local Drivers Choose Victory Lane Automotive Convenient & Local – No need to drive far. We’re right here in Universal City and proudly serve our community. Highly Rated & Trusted – Customers consistently give us top reviews for honest, reliable service. State-of-the-Art Tools – Our advanced scanners catch issues across the engine, transmission, brakes, AC system, and more. Prevent Costly Repairs – Addressing problems early keeps your vehicle safe and saves you money down the road. When you search “mechanic near me” or “engine diagnostic Universal City”, we’re the shop that local drivers rely on. Don’t Ignore the Warning Signs Your vehicle’s computer system is designed to protect you—and ignoring warning lights or performance issues can turn a small problem into a major repair. If your check engine light is on, or if you’ve noticed any of the warning signs above, schedule your car diagnostic with Victory Lane Automotive today. We’ll make sure your vehicle is road-ready, safe, and running at its best. Victory Lane Automotive — your trusted, local, highly rated auto repair shop near San Antonio.
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Keep It or Trade It? Why Hanging onto Your Vehicle May Be the Smarter Move! With new car prices at an all-time high, many drivers are facing a big decision: do I invest in maintaining my current vehicle, or is it time to buy something new? The temptation of that “new car smell” is real—but so is the reality of $1,000 + monthly car payments. According to recent data, the average new vehicle loan is now over $1,000 per month before factoring in insurance, taxes, and fees. That’s a big chunk of change coming out of your wallet every single month—often for 6 to 7 years. The True Cost of Ownership: New vs. Existing Vehicle Let’s say your current car or truck needs $1,500 in repairs or maintenance. It might feel like a lot upfront, but compare that to dropping $12,000+ per year on a new vehicle loan. That $1,500 investment could buy you another year (or several) of reliable driving—without the monthly financial pressure. And here's the thing: even new cars require maintenance. Oil changes, brakes, tire rotations, alignments, and fluid flushes don’t disappear just because the car is newer. If you already stay on top of your vehicle’s maintenance, you’re more than halfway to extending its lifespan and keeping it dependable. What Maintenance Really Means Many customers come to us thinking their vehicle is “on its last leg,” when really, it just needs a little TLC. At Victory Lane Automotive, we focus on preventative maintenance—things like: • Fluid checks and replacements • Suspension and steering inspections • Battery and charging system testing • Brake services • Cooling system and radiator checks • Regular oil changes These aren't just repairs—they’re investments in keeping your vehicle running stronger, longer. Your Vehicle Might Be Worth More Than You Think Modern vehicles are built to last well past 150,000 or even 200,000 miles with proper care. If your car is paid off and still running well, it may be more valuable sitting in your driveway than trying to sell or trade it in. Plus, you’re familiar with it. You know how it drives, its quirks, and its history. A new vehicle? That’s a whole new learning curve—and potentially a whole new list of unexpected issues. The Bottom Line: Before you sign up for years of payments and interest, consider this: could your current vehicle just need a little maintenance love? At Victory Lane Automotive, we can help you weigh your options honestly and provide a thorough vehicle inspection to assess what’s needed (and what’s not). If you’re sold on trading in your current vehicle, we provide a pre-purchase inspection—which is a detailed health report of the vehicle with recommended repairs/services in order to plan ahead for your future vehicle. Keep our customer’s well informed and creating a stress-free experience is what we aim for. Our ASE-certified technicians are here to keep your car safe, reliable, and road-ready. Schedule a diagnostic or inspection today—and drive with confidence.
Is Your Car Due for a Tune-Up? Here's What You Need to Know ... If your car’s been running a little rough, your gas mileage has dropped, or your check engine light won’t turn off—it's probably time for a tune-up. At Victory Lane Auto, we specialize in tune-up services for all makes and models, especially European vehicles. Whether you're in San Antonio, Schertz, Selma, Converse , or Live Oak , our ASE-certified technicians are here to keep your engine running at its best. 🔧 What is a Tune-Up? A car tune-up is preventative maintenance that helps keep your engine performing efficiently and reliably. It typically includes: • Replacing spark plugs • Inspecting and replacing air filters • Checking ignition timing • Cleaning the fuel system • Testing battery and charging systems These small services go a long way in avoiding costly repairs down the road. 🚨 Signs You Need a Tune-Up If you're experiencing any of these symptoms, search no further than Victory Lane Auto: • Engine misfires or idles rough • Poor fuel economy • Difficulty starting • Loss of power or acceleration (sluggish) • Dashboard warning lights (especially the check engine light) Searching "car running rough near me" or "why is my engine shaking?"? We’ve got answers—and solutions. Your driving habits, environment (roads/climate) attribute to what and when services are recommended. 🌟 Why Choose Victory Lane Automotive? ✅ Family-Owned and Operated ✅ ASE-Certified Technicians ✅ 3-Year / 36,000-Mile Warranty ✅ European Vehicle Specialists ✅ Friendly, Honest Service Our shop at 264 Kitty Hawk Rd in Universal City is just minutes from Selma, Live Oak, Converse , and Schertz , and we offer courtesy shuttles and loaner cars for your convenience. 🛠 When to Schedule a Tune-Up Every vehicle is different, but as a rule of thumb, schedule a tune-up every 30,000 miles or once a year—whichever comes first. If you’re unsure, come in for a multi-point inspection and we’ll let you know what your vehicle needs. Ready to Schedule? Stop searching "best tune-up near me"—Victory Lane Auto is your trusted neighborhood shop. Book your tune-up today and keep your car running like new. 📞 Call us at (210) 658-8325 📍 Visit: https://www.victorylane-uc.com/
WHY IS MY CAR PULLING? WHEEL ALIGNMENT NEAR ME Wondering if your vehicle is due for a wheel alignment? Ask yourself these questions: • Does your steering wheel sit off-center? • Does your vehicle veer or pull in one direction? • Does your vehicle vibrate while driving? • Do you notice uneven tire wear? These issues can occur naturally over time due to aging parts- or suddenly after hitting an unavoidable pothole or curb. Your vehicle is designed with preset angles determined by the manufacturer to ensure your tires are properly aligned with each other and the road. When even one wheel is out of alignment (meaning it's angled differently than intended), your vehicle won’t drive as smoothly or efficiently. During your visit to Victory Lane Auto , we’ll include a detailed diagram in your Digital Vehicle Inspection showing the alignment angles of your vehicle: • Caster: Compares the steering axis to the vertical axis from a side view of the vehicle. • Camber: Measures the vertical tilt of the wheels from the front or rear view. • Toe: Indicates whether the wheels point inward or outward when viewed from above. A proper wheel alignment improves drivability, prevents uneven tire wear, and extends the life of your tires. We recommend checking your alignment every other oil change, at least once a year, or immediately after buying new tires- especially if you answered “yes” to any of the questions above. 📞 Give us a call at (210) 658-8325 for a professional alignment check. We'll also inspect your tires, steering, and suspension components. We look forward to serving you-and earning your trust as a lifelong customer!
