---
id: faq-0081
title: "What should I do if my check engine light comes on?"
category: faq
subtopic: service-and-maintenance
page_type: faq
source_url: "https://www.castlevwcars.com"
tags: ["diagnostics", "warning-lights", "troubleshooting"]
questions:
  - "Why is my check engine light on?"
  - "Is it safe to drive with the check engine light?"
  - "What does the engine warning light mean?"
related: [electrical-service, safety-inspections, diagnostics]
dealer: Castle Volkswagen of Schaumburg
---

Your check engine light signals a problem with your engine, emissions system, or transmission-anything from a loose gas cap to a serious engine issue. It's safe to drive briefly to reach a service center, but don't ignore it; the problem usually gets worse.

Castle Volkswagen of Schaumburg uses advanced diagnostic equipment to read your vehicle's codes and pinpoint the problem accurately. Our Service team will explain what's wrong and the best way to fix it, using genuine parts to keep your vehicle running right and your warranty protected. Don't guess-get a proper diagnosis. Call (847) 593-4700 to schedule your diagnostic appointment, or stop by and we'll get you answers fast.