This is an error generated as a result of a problem with the valve in the exhaust. Upon start up, your bike will cycle the exhaust valve. If there is a problem doing so, it will throw the code. Look at the cat/muffler. On the right side of the bike, you will see where a cable comes in to a contraption with a spring. My guess is that something is wrong there (probably a broken spring). Take a look at it and report back if you still have questions. Hope this helps.