Your check engine light (CEL) is your vehicle’s way of saying something isn’t working as intended. It can be triggered by anything from a misfire, faulty sensor, or emissions issue to something as simple as a loose cap. The key is not to ignore it—because small issues can quickly lead to bigger, costlier problems.

Common causes include:

• Oxygen or mass airflow sensor failure
• Faulty spark plugs, coils, or injectors
• EVAP system leaks or loose fuel cap
• Catalytic converter efficiency faults
• Transmission
• fuel-trim codes

Our technicians use advanced OEM-grade scan tools and live data monitoring to isolate the exact fault, not just the code. We don’t “clear and guess”—we diagnose and verify the root cause. Every diagnostic includes a digital health report with code descriptions, component status, and clear repair recommendations.

At The Garage MKG, diagnostics is more than plugging in a scanner. Our ASE-certified technicians interpret data from multiple modules, comparing sensor readings, fuel trims, and real-time operation data to identify cause, not coincidence.

Our process includes:

• Full-system scan across engine, transmission, and emissions modules
• Live data analysis and waveform testing where applicable
• Verification of system integrity with functional tests
• Documentation of results with technician notes and supporting images

We diagnose accurately the first time, saving you from wasted parts and unnecessary repairs. You’ll receive transparent recommendations that make sense, prioritized by safety and urgency.

Drivers throughout Muskegon, Norton Shores, and Roosevelt Park trust The Garage MKG because we focus on facts, not fear. We don’t use scare tactics or sell unnecessary parts—we explain what’s wrong, why it happened, and what it will take to fix it properly.

Our team specializes in advanced diagnostic procedures for both European and domestic vehicles, using the same tools and logic processes found in dealership environments. Whether it’s an intermittent fault or a complex communication error, we have the training and technology to uncover it—and prove it.

Every service includes a Complete Vehicle Health Report with visual documentation and step-by-step findings.

If your check engine light is on or flashing, don’t ignore it—schedule your diagnostic appointment with The Garage MKG today. Call (231) 246-7735, visit 1860 Henry St, Muskegon, MI, or book online anytime.

We’ll identify the issue, explain it in clear terms, and give you confidence that your vehicle is running as it should—no guessing, no hidden surprises.