Do you have a 1998 Land Rover Discovery 1 that is giving you a PO455 code? Well, it can be 1 of 4 things. Watch this video to learn what you can do to fix this problem. It can be as easy as tightening your gas cap. But if you need to change your gas cap watch this youtube video and I will show you how to replace your gas cap for less than 15 bucks with a simple screwdriver. Watch and save! Don’t forget to check out my other Land Rover DIY videos where you can save big money.