Expert Insights from Harrell & Beverly
If there’s one warning light on your dash that tends to raise questions, it’s the Check Engine Light (CEL). After all, this single light can point to countless potential issues—ranging from a minor inconvenience to a major mechanical problem. Here at Harrell & Beverly Transmissions & Auto Repair, we’ve been diagnosing and fixing check engine light problems for over 65 years in the Sanford community. We’ve literally seen it all and are equipped with the best diagnostic tools and team to find—and fix—the root cause.
While we can’t definitively diagnose your vehicle over the internet, we can share some of the most common reasons that pesky orange (or sometimes red) light might come on. If yours lights up, don’t panic—just keep reading, then give us a call or swing by the shop, and we’ll get you back on the road with confidence.
Common Reasons Your Check Engine Light Might Be On
1. Loose or Damaged Gas Cap
It might sound too simple, but a loose gas cap can trick your car’s computer into thinking there’s a leak in the fuel system. This can trigger the check engine light because unsealed vapors can affect your car’s emissions and fuel efficiency.
Quick Fix: Tighten the cap and drive for a short while. If the light stays on, it could mean the cap is damaged and needs replacing—or there’s another underlying issue.
2. Faulty Spark Plugs or Ignition Components
Spark plugs create the spark that powers your engine’s combustion. Over time, they can become dirty or worn out, leading to misfires and reduced fuel efficiency. Ignition coils or wires can also fail, causing similar problems.
Signs to Watch For: Rough idling, sluggish acceleration, or declining MPG.
Why It Matters: Left unattended, misfires can lead to larger engine problems over time, costing you more headache and money.
3. Transmission or Drivetrain Issues
You might assume the check engine light is only for engine troubles, but modern vehicles often have interlinked systems. That means transmission or drivetrain problems can also cause the CEL to illuminate.
Examples: Low or old transmission fluid, malfunctioning solenoids, or a failing torque converter.
Expert Advice: Transmission work can be complex. Our specialized team at Harrell & Beverly has the training and tools to handle it correctly the first time.
4. Emissions & Sensor Problems
Your vehicle relies on various sensors—like oxygen sensors—to regulate airflow and exhaust emissions. If these sensors detect abnormal readings, they’ll send a signal to the engine control module, lighting up the check engine indicator.
Potential Culprits: Failed O2 sensor, EGR issues, or a clogged catalytic converter.
Why It Matters: Ignoring emissions-related issues can lead to poor fuel economy, reduced performance, or even damage to more expensive components.
5. Urgent or Severe Failures
If your check engine light flashes or appears red, it indicates a serious issue that demands immediate attention. Driving in this condition can risk severe damage to the engine or transmission—and potentially rack up a hefty repair bill.
Next Steps: Pull over as soon as it’s safe, shut off your vehicle, and call Harrell & Beverly. We can arrange a tow and get you to our shop safely. Don’t attempt to keep driving with a blinking or red CEL.
We Can’t Diagnose Online—But We Can Solve It in Person!
While these are a few of the common triggers, there are dozens more that could be behind your check engine light. Every vehicle and situation is unique. That’s why we always encourage our customers to come by Harrell & Beverly for a proper diagnostic test. Our ASE Certified Master Technicians combine years of experience, state-of-the-art diagnostic equipment, and a commitment to honest communication to pinpoint the real culprit.
Why Choose Harrell & Beverly?
65 Years of Excellence: Our legacy in Sanford spans decades, and we still run our shop on the same principles of honesty, quality, and customer care.
Advanced Diagnostics: We invest in top-tier diagnostic equipment to accurately identify your vehicle’s problems—fast.
Skilled, Certified Team: Our technicians undergo continuous training to stay current on the latest vehicle technologies.
Transparent Process: You’ll always know what we’re doing, why we’re doing it, and how much it will cost. No hidden surprises.
Don’t Ignore That Light—Schedule Testing and Diagnostics with the Experts!
If your check engine light is on—or, worse yet, flashing—don’t wait for something to break. Call Harrell & Beverly or book your appointment online. We’ll run a comprehensive diagnostic test, explain exactly what’s happening, and guide you through the next steps to keep your car performing at its best.
Remember: The sooner you address a check engine light, the more likely you are to avoid major repairs and keep your vehicle safe on the road. After 65 years of serving the Sanford community, we’re confident we can tackle any problem that pesky orange light throws our way.
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