Firstly please check the English manual that comes with the product, or you can check for online manuals or Blogs for advice. If you still can not figure out the problem, please submit a ticket to our customer service representative at:obd4u.co.uk@gmail.com. They will offer you professional tech support and help you assess if your product is defected.
We will try our best update our blog,list more Technical problems and give some tips for our customers.