vehicle is a 2001 Kia Truck Sportage 4WD 4Dr L4-1998cc 2.0L DOHC MFI, it has a code PO13 recorded but no additional information to go on. The vehicle does have a PO326 knock sensor code but I don't think it is related. Alldata does not show any information for the code either, anybody have any ideas what this code is?