CHECK ENGINE

If your check engine light suddenly appears — or starts flashing — your vehicle is signaling that something needs immediate attention. At Express Lube & Car Care Richland Hills, we offer precise, same-day diagnostics using industry-leading equipment and the expertise of ASE-certified technicians. Whether the issue is minor or serious, early diagnosis protects your engine and prevents costly breakdowns.

What the Check Engine Light Means

Your vehicle uses an onboard diagnostics (OBD-II) system to monitor major components such as the engine, emissions, fuel delivery, and ignition systems. When the computer detects a fault, it stores a code and illuminates the warning light. Depending on the issue, you may see:

• “Check Engine” message
• “Service Engine Soon” alert
• Engine-shaped warning icon

Some problems are simple — like a loose fuel cap — while others can cause catastrophic engine or catalytic converter damage if ignored. A flashing light indicates an urgent condition that requires immediate service.

Common Reasons the Check Engine Light Comes On

• Loose or missing gas cap
• Failed oxygen sensor
• Misfires from worn spark plugs or ignition coils
• Malfunctioning catalytic converter
• A faulty mass airflow sensor
• Vacuum leaks or emissions faults
• EGR system malfunctions

Our technicians retrieve diagnostic trouble codes (DTCs), investigate the cause, and verify the problem — ensuring you receive accurate repairs.

Steady vs. Flashing Light — What’s the Difference?

• Steady Check Engine Light: Indicates a non-emergency issue that should be diagnosed promptly to prevent additional wear and reduced fuel efficiency.
• Flashing Check Engine Light: Signals a severe misfire or critical malfunction. Continuing to drive can cause catalytic converter damage. Bring your vehicle in immediately.

Richland Hills Engine Diagnostics You Can Depend On

At Express Lube Richland Hills, we don’t just scan your vehicle — we provide complete mechanical and electronic testing to confirm the cause. Our team explains your options clearly and never recommends unnecessary repairs.

Why Local Drivers Trust Us

• ASE-certified technicians with advanced diagnostic training
• Comprehensive OBD-II scanning and troubleshooting
• Accurate, honest repair recommendations
• Quick turnaround and competitive pricing
• We service all makes and models

If your check engine light is on, let the trusted professionals at Express Lube & Car Care Richland Hills diagnose and repair the issue before it turns into a bigger problem.