CHECK ENGINE

When your check engine light turns on, your vehicle is letting you know something isn’t working as it should. At Express Lube & Car Care Plano, we specialize in fast, accurate diagnostics using advanced scan tools and the expertise of our ASE-certified technicians. Whether it’s a minor sensor issue or a more serious mechanical concern, quick attention can prevent major engine damage and expensive repairs.

What Your Check Engine Light Is Telling You

Your vehicle’s onboard diagnostics (OBD-II) system constantly monitors critical components such as the engine, emissions system, transmission, and fuel system. When an irregularity is detected, a fault code is stored and the warning light is triggered. You may see messages like:

• “Check Engine”
• “Service Engine Soon”
• A glowing (or flashing) engine-shaped symbol

The cause can be as simple as a loose gas cap or as serious as a misfire that can damage the catalytic converter. If the light is flashing, drive as little as possible and bring your vehicle in immediately.

Common Causes of a Check Engine Light

• Loose, missing, or damaged gas cap
• Faulty oxygen sensor
• Worn spark plugs or ignition coils
• Failing catalytic converter
• Bad mass airflow (MAF) sensor
• Vacuum leaks or emissions issues
• Malfunctioning EGR valve or sensors

Our diagnostic process identifies the exact cause so you never pay for repairs you don’t need.

Steady vs. Flashing Check Engine Light

• Steady Light: A problem has been detected, but it is not usually an emergency. A diagnostic should be done soon to prevent further issues.
• Flashing Light: Indicates a severe misfire or major malfunction. Continued driving can damage the catalytic converter — bring your vehicle in immediately.

It’s normal for the light to briefly illuminate during startup; this simply means the system is performing a standard check.

Expert Diagnostics You Can Trust

At Express Lube Plano, we go beyond simply reading codes. Our technicians perform a full system evaluation to confirm the problem and provide real solutions. We explain the issue clearly and offer honest, cost-effective repair recommendations.

Why Plano Drivers Choose Us

• ASE-certified technicians
• Complete OBD-II scan and performance evaluation
• Accurate diagnostics — no guesswork
• Fast service and fair pricing
• Service for all makes and models

If your check engine light is glowing or flashing, don’t wait. Visit Express Lube & Car Care Plano and let our team diagnose the issue before it becomes a major repair.