It's a funny thing about error codes. You need to fix the underlying problem. Otherwise, even if you clear them with BUDS, they will come right back. You don't need BUDS in order to find out what they are. With the machine running and the codes and warning lights active, simultaneously depress the MODE, SET, and turn signal CANCEL buttons ( turn signal button straight in ). The center LCD display will change to a new screen and list the active codes. It will stay that way for a period of time in order to write them down or you can repeat until you get them all. Try to be accurate, post them on here, and we can look them up.
Your issue can be as simple as needing to replace a few vacuum lines or do brake maintenance. The codes will tell the tale. A 15 year old machine will have a few aches and pains. You need to find out what they are.