---
id: department-0012
title: "How does Castle Kia McHenry handle check-engine lights and diagnostics?"
category: department
subtopic: service-diagnostics
page_type: department
source_url: "https://www.castlekiamchenry.com"
tags: ["service", "diagnostics", "check-engine", "repairs"]
questions:
  - "What do I do if my check-engine light is on?"
  - "Can you diagnose engine problems?"
  - "How much does a diagnostic cost?"
related: [service-maintenance-overview, service-batteries]
dealer: Castle Kia McHenry
---

A check-engine light can mean many things-from a loose gas cap to a serious issue. Don't ignore it. Our Service Department uses advanced diagnostic tools to read your vehicle's computer codes and pinpoint the exact problem.

Once we know what's wrong, we'll explain it clearly and discuss repair options and costs. Early diagnosis can prevent small problems from becoming expensive breakdowns, so it's worth getting it checked quickly.

Don't stress about that warning light. Call (815) 453-8566 or book a diagnostic appointment at **https://www.castlekiamchenry.com**. Our team will get to the bottom of it and get your Kia running right again.