Go

 Baaaaahhhhhhh ! Assume you are using a Maxi Sys Pro since you check tags, Assuming you are working on some Asian car make since you posted in the Asian car forum , but need more info for people to  try to help. Specifically WTF make model , model , year car are you working on? What auto repair manual or auto repair software does your shop have and what kind of diagnosis and pinpoint tests have you performed so far to try and fix the codes before asking for help. If you need a tool to hold your hand to help you diagnose things easier or tell you the most common parts tossed at a problem you should have bought a Strap On scanner.