Q&A

 Master

The sensor is about $130 but it is located behind the timing cover and requires removing the timing belt to change (about 5.5 hours labor). I would test the integrity of the wiring at the sensor by testing it back at the fuel injection computer, its best to do all testing of sensors and powers and grounds at the computer using an oscilloscope and voltmeter. Kia as a car manufacturer put a lot of great technical information and work shop manuals on line for free for Kia owners. www.kiatechinfo.com
There is a professional service called Identafix. http://www.identifix.com/info/about_us.htm They only deal with professional repair shops. They are in the Minnesota 651-633-8007 begin_of_the_skype_highlighting 651-633-8007 end_of_the_skype_highlighting. Your auto repair shop do all their diagnosis tests, and discuss your problem with a team of professional technicians great service cheap and very bright people. If the repair shop that are repairing your car are stumped this is a great service. This company only deal with automotive repair shops and don't answer questions for the general public but are an amazing knowledge base.