The Real Cost of Ignoring That Check Engine Light
May 14, 2025
What Does the Check Engine Light Mean?
For most drivers, the check engine light is one of the most dreaded sights on the dashboard. It usually appears at the most inconvenient times—when you’re late for work, picking up the kids, or heading out on a road trip. But no matter how tempting it is to ignore it, letting that little light stay on could lead to serious problems down the road—both for your car and your wallet.
At Copperstate Auto & Fleet, we believe in preventative maintenance and driver education. In this article, we’ll break down what the check engine light really means, common causes, and the real-world cost of waiting too long to act.
The check engine light is part of your vehicle’s onboard diagnostics system (OBD-II). When it illuminates, your car’s computer is letting you know that something isn’t working as it should. It could be something simple—like a loose gas cap—or something more serious, like an engine misfire, faulty oxygen sensor, or catalytic converter failure.
The check engine light is part of your vehicle’s onboard diagnostics system (OBD-II). When it illuminates, your car’s computer is letting you know that something isn’t working as it should. It could be something simple—like a loose gas cap—or something more serious, like an engine misfire, faulty oxygen sensor, or catalytic converter failure.
The light may appear as solid or flashing:
Solid Light: Indicates a less urgent issue that still needs attention.
Flashing Light: Indicates a serious problem like an engine misfire that could damage the catalytic converter. This requires immediate attention.
Ignoring either one can lead to costly repairs or even unsafe driving conditions.
Common Reasons Your Check Engine Light Is On
Here are some of the most common issues behind that dashboard warning:
Here are some of the most common issues behind that dashboard warning:
Loose or Faulty Gas Cap
Surprisingly, this is one of the most common causes. A loose or cracked gas cap can let fuel vapors escape and trigger the warning.
Oxygen Sensor Failure
Your car’s O2 sensors monitor how much unburned oxygen is in the exhaust. A faulty sensor can affect fuel efficiency and emissions.
Catalytic Converter Issues
This emissions control device helps reduce pollution. If it’s failing, it could result in poor fuel economy and increased exhaust fumes.
Mass Airflow Sensor Problems
This sensor tells your car’s computer how much air is entering the engine. When it malfunctions, it can cause rough idling and decreased performance.
Spark Plug or Ignition Coil Failure
These are essential for engine combustion. Faulty plugs or coils can lead to misfires and long-term engine damage.
The Cost of Waiting
While the warning light itself may not seem urgent, the problems behind it can quickly escalate—and so can the repair costs. Here’s how putting off repairs can impact you:
Fuel Efficiency Drops
A malfunctioning engine system often burns more fuel. That’s money lost every time you fill up.
Increased Emissions
Delaying repairs can lead to failing an emissions test—something Arizona drivers can’t afford if they need their vehicle registered.
Major Engine Damage
What starts as a $50 sensor replacement could turn into a $3,000+ engine rebuild if ignored long enough.
Safety Risks
A car that misfires or loses power on the road can put you and your passengers in danger, especially at high speeds or in heavy traffic.
Why Quick Diagnostics Matter
One of the best things you can do when your check engine light turns on is to schedule a diagnostic scan. At Copperstate Auto & Fleet, we use advanced tools to identify the exact issue behind the warning light. Many times, it's a quick fix that can be handled affordably and on the same day.
Waiting only creates more uncertainty—and often more damage. Early detection saves time, money, and peace of mind.
How We Help at Copperstate Auto & Fleet
As a family- and veteran-owned business in Mesa, AZ, we’re committed to providing honest, transparent service to local drivers and fleet managers. Here’s what you can expect when you visit us:
✅ Free or low-cost check engine light diagnostics
✅ Clear, upfront explanations (no jargon or surprises)
✅ ASE-certified technicians who treat your car like it’s their own
✅ Fast turnaround and fair pricing
✅ Fleet service programs for businesses that need to keep their vehicles on the road
When to Take Action
If your check engine light is on, here’s what you should do:
Check your gas cap – Tighten it and see if the light turns off after a few trips.
Watch for other symptoms – Strange noises, reduced power, or poor mileage?
Schedule a diagnostic – Especially if the light is flashing or paired with other symptoms.
Don’t let fear of the unknown keep you from taking action. Most check engine light issues can be solved quickly when caught early.
Trust the Pros Who Keep Arizona Driving
At Copperstate Auto & Fleet, we’ve seen it all—from the simplest sensor issue to full engine replacements. The difference? Our customers who acted fast saved thousands and stayed safer on the road.
Have a check engine light on? Stop by or schedule a diagnostic today. Let’s find the problem before it becomes a bigger one.
You’re cruising down the road, enjoying your drive—when suddenly, you feel a slight vibration. Then it gets worse. Your steering wheel starts shaking, and you're left wondering: Is this dangerous? Is my car okay? Should I pull over? At Copperstate Auto & Fleet, we hear this question often, and the truth is: a shaking steering wheel is never something to ignore. It can point to a range of issues—from minor to urgent—and catching it early can save you from costly repairs and unsafe driving conditions. Let’s break down the most common causes of a shaking steering wheel, when to take action, and how we can help. What Causes a Shaky Steering Wheel? The most common reasons for steering wheel vibrations are related to your wheels, tires, suspension, or brakes. Each of these systems plays a vital role in how smoothly your car drives—and how safely it stops. Here are the top culprits: 1. Wheel Alignment Problems If your wheels aren’t properly aligned, your car won’t roll smoothly—causing the steering wheel to vibrate, especially at higher speeds. This misalignment can occur from hitting a pothole, curb, or just normal wear and tear over time. Signs of wheel misalignment: Uneven tire wear Vehicle pulling to one side Steering wheel off-center when driving straight Vibration around 50–75 mph 2. Tire Issues Tires are the first place we look when diagnosing a shaky steering wheel. Uneven wear, tire separation, or improper inflation can cause vibration that travels through the steering system. Even new tires can cause shaking if they’re not balanced properly. Common tire-related causes: Unbalanced tires Tire cupping or feathering Internal tire damage or belt separation Over- or under-inflation 3. Brake Problems If your steering wheel shakes when you brake, the issue is often related to your brake system—especially warped rotors. Rotors are the round metal discs that your brake pads clamp onto when stopping. Over time, they can become uneven due to heat and pressure. Brake-related symptoms: Vibration only when braking Brake pedal feels pulsy or inconsistent Burning smell or squealing noises Warped rotors, sticking calipers, or worn brake pads can all trigger steering wheel shake and should be addressed immediately to avoid unsafe driving. 4. Suspension or Steering Component Wear Your vehicle’s suspension and steering systems are designed to absorb shock and keep you in control. When parts like tie rods, ball joints, or control arms start to wear out, they can cause loose movement in the wheels—and vibrations in the steering wheel. Look out for: Clunking noises when turning Excessive play in the steering wheel Uneven driving or instability at highway speeds These issues often worsen over time and can become safety hazards if left unchecked. 5. Engine or Transmission Problems Less commonly, a shaking steering wheel could point to engine misfires, transmission issues, or problems with motor mounts. These are more likely if the vibration occurs while idling or accelerating from a stop. In these cases, it’s best to schedule a diagnostic inspection to pinpoint the cause. When Should You Be Concerned? Here’s a quick guide to when steering wheel shaking requires attention: ✅ Only happens at high speeds? Likely a tire or balance issue. ✅ Shakes during braking? Probably brake-related. ✅ Constant shaking at any speed? Could be alignment, suspension, or wheel damage. ✅ Vibrates at idle? Might be engine or transmission related. In any case, don’t ignore it. What starts as a small vibration can quickly snowball into more serious (and expensive) damage. Why Fix It Early? Waiting too long can lead to: Increased tire wear and frequent replacements Brake damage, including rotors and calipers Poor fuel economy due to added strain Safety risks, especially at highway speeds or in bad weather More expensive repairs down the line How Copperstate Auto & Fleet Can Help Located in Mesa, Arizona, Copperstate Auto & Fleet is family- and veteran-owned, and proud to serve both everyday drivers and fleet vehicles with precision and care. When you bring your vehicle in for a steering wheel vibration, here’s what we do: 🔧 Full suspension, tire, and brake inspection 🔧 Digital diagnostics to detect imbalances or alignment issues 🔧 Transparent, no-pressure recommendations 🔧 Same-day service for many repairs 🔧 Fleet vehicle monitoring and maintenance packages available Whether you're driving a commuter car or managing a fleet of work trucks, we’ll help keep your wheels rolling smoothly, and your hands steady on the wheel. Schedule Your Inspection Today A shaking steering wheel is your car’s way of saying, “Something’s not right.” At Copperstate Auto & Fleet, we’ll help you find the cause and fix it fast—so you can drive with confidence. Don’t wait for it to get worse. Call us or schedule an appointment online today, and let our ASE-certified team get you safely back on the road.
Discover expert computer diagnostics at Copperstate Auto And Fleet in Mesa, AZ. Enhance vehicle performance, prevent issues. Visit us today for top care.
Your brakes are one of the most important safety features on your vehicle—but they’re often overlooked until a problem arises. Whether you're driving a commuter car, an SUV, or a work truck, understanding how and when to care for your brakes can save you money and help keep you safe on the road. When Should You Replace Your Brakes? Brake pads wear down over time with normal use, but how fast they wear depends on your driving habits and the type of vehicle you drive. Here are a few signs it's time to replace them: Squealing or grinding noises when you brake Increased stopping distance Vibrations or a spongy feeling in the brake pedal A dashboard brake warning light As a general rule of thumb, brake pads should be replaced every 25,000–70,000 miles, depending on your vehicle and how you drive. High-performance vehicles or trucks that carry heavy loads may require more frequent replacements. Cleaning and Dusting Brake dust is a combination of debris from your brake pads and road grime. Over time, it can build up and affect your brake system’s performance. Regularly cleaning your brakes—especially if you drive in dusty or off-road conditions—can help prolong their life and prevent corrosion. We recommend having your brakes inspected and cleaned every 12,000 miles or at least once a year. In Arizona, with all the dust and sand in the air, you may need to do this more frequently. Brake Maintenance by Vehicle Type Passenger Cars: Most sedans and compact vehicles have smaller brake systems that wear out faster if you drive aggressively or in stop-and-go traffic. Frequent city driving means more wear on your pads. SUVs & Crossovers: These vehicles are heavier, and while their brakes are more robust, they still wear faster if you tow, haul, or drive on hilly terrain. Trucks & Commercial Fleets: Work vehicles carry heavy loads and require tougher brake systems. Frequent maintenance, including inspections and cleaning, is essential to avoid costly repairs and keep your fleet running smoothly. How Arizona Heat Impacts Your Brakes In the Valley of the Sun, high temperatures can take a toll on your brake system. Here’s how: Brake fluid can overheat , reducing braking efficiency (known as brake fade) Heat causes rotors to expand , which may lead to warping or uneven wear Dust and sand can clog up brake components , accelerating wear If you’re driving through Arizona’s hot summers, be proactive. Have your brakes checked before peak heat season and after long road trips or mountain drives. Need a Brake Check? We’ve Got You Covered. At Copperstate Auto & Fleet, we offer full brake inspections, cleanings, and replacements tailored to your vehicle and driving environment. Whether it’s your personal car or a commercial fleet, our expert technicians keep your brakes in top shape—so you can drive with confidence. Schedule your brake check today and stay safe on the road!
Dependable fleet vehicle repair in Mesa, AZ from Copperstate Auto And Fleet. Keep your business running with expert service and fast turnaround. Visit us today!
Get expert tire and wheel care in Mesa, AZ at Copperstate Auto And Fleet. Alignment, balancing, inspections & more. Visit us today for reliable tire services!
Explore expert complete auto repair in Mesa, AZ with Copperstate Auto And Fleet. Certified service, diagnostics, tire care & more. Visit us today for reliable repairs!
