I have posted in another post the P0172 & P0175 codes my X5 is throwing. I am reading these with a generic code reader. My question for you is would the Peake Scan Tool give me more specific information to troubleshoot with or would only the real high dollar GT1 types help me.

I have replaced the MAF sensor and it fixed it for about a month and several hundred miles but the SES and same codes have returned.