---
id: faq-0068
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:
  - "What does the check engine light mean?"
  - "Is it safe to drive with the check engine light on?"
  - "How do I get my check engine light diagnosed?"
related: [diagnostic-service, emissions-service, engine-health]
dealer: Castle Volkswagen of Schaumburg
---

A check engine light signals that your vehicle's onboard diagnostic system has detected an issue-from a loose gas cap to a serious engine problem.

**Safe to drive?** Usually, but don't ignore it. Get a diagnostic scan to identify the exact cause. Delaying service can lead to bigger repairs or damage.

**What happens:** Our technicians plug into your VW's diagnostic port, read the trouble codes, and pinpoint the issue. Many problems are simple fixes; others need prompt attention to avoid costly damage.

Castle Volkswagen of Schaumburg offers professional diagnostics to get you answers fast. Don't wait-call (847) 593-4700 to schedule a scan. We'll tell you exactly what's going on and get your Volkswagen back to running great.