The check engine light is on and it could be anything from a loose gas cap to a fouled up cylinder. We show you how to find out the severity of the problem with the the CarMD diagnosis tool before bringing the car to the shop.
Reviews
When you purchase through links in our articles, we may earn a small commission. This doesn't affect our editorial independence.
The check engine light is on and it could be anything from a loose gas cap to a fouled up cylinder. We show you how to find out the severity of the problem with the the CarMD diagnosis tool before bringing the car to the shop.