I have two on mine everytime I start her up. SID Unprog and Rear Light Failure. I don't really care about either, it's just annoying to press Clear everytime.
I tried fixing the light failure one by replacing a couple bulbs, but I'm sure that I have to replace every fkn bulb back there with the exact same type to make it happy. And well, I'm lazy.
SID Unprog is because I bought a new SID since mine was losing pixels, and I don't really feel like paying the stealership to sync it to my car. There has been zero ill effects from this that I've seen, everything works just fine.