True but the peake tool will read your codes when there is a problem. This tool only resets your lights I believe. I bought one from this USA source and I also got one coming from China. The one from China is not here yet..it may take a while. I can't believe they can make something for under $4 and look this good. For as often as someone has to reset there oil inspection lights..its an amazing deal. Hope I never need a peake tool but I want to be prepared beings there is no one to work on BMW's for 200 miles. So all I did with this tool was plug it in..turn the key on so the dash lights were on.. push the INSP button and hold it till the light goes out..then push the oil button till the light goes out and it was done! No directions were included. Pretty simple, I left 2 links above for those interested.