---
id: faq-0084
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.castlesubarumchenry.com"
tags: ["warning lights", "diagnostics", "service"]
questions:
  - "My check engine light is on-what does it mean?"
  - "Is it safe to drive with the check engine light on?"
  - "How do I fix the check engine light?"
related: [service-appointments]
dealer: Castle Subaru McHenry
---

A check engine light signals that your Subaru's onboard diagnostic system detected an issue-anything from a loose gas cap to an emissions problem or engine fault. It's usually safe to drive, but you should have it diagnosed soon.

Don't ignore it! Even a minor issue can affect performance or fuel economy, and delaying diagnosis might lead to costlier repairs later. Castle Subaru McHenry's service team uses computer diagnostics to quickly identify what's wrong and explain your options.

Bring your Subaru in soon. Call (779) 601-0797 to schedule a diagnostic appointment, and we'll get to the bottom of it fast.