In this post, we’ll walk you through how professional mechanics diagnose check engine light issues, the tools they use, and what to expect if you take your car in for a diagnostic. Step 1: Visual Inspection Before diving into high-tech diagnostics, most mechanics start with a visual inspection. They’ll pop the hood and check for: • Loose or damaged wires • Disconnected or cracked ... https://denverautorepairandservice.com/check-engine-light/