Hello guys i have a issue in my car while iam reading OBD II CODES that i have a backup current failure , what its mean and which component i have to check it. Guys please help me

 

First, what kind of OBD2 reader are you using? Does it communicate with the car when you plug it in? is your key in position 2 (dashlights on, engine off)? Most readers draw power from the car so if the key is off, or the OBD2 port has a blown fuse, the reader will be dead.