For anyone that needs a great diagnostic tool and has a smart phone I'd highly recommend getting the Devtoaster Rev app and using it with PLX Devices wi-fi/obd tool. I was able to read and clear a p0303 code that wouldn't go away as well as using the phone as a gauge that will read boost, lateral g's, etc.
My jeeps speedo has been acting up so I moved the set-up to it and was able to get on-the-fly speedometer readings. Very cool stuff! I'd highly recommend it if your a home mechanic or racing.