Why does your 2005 Hyundai Santa fe idle at high speed from cold?

A 2005 Hyundai Santa Fe may idle at a high speed when cold due to a malfunctioning idle air control valve (IAC), which regulates the engine's idle speed. Additionally, a faulty thermostat could prevent the engine from reaching the proper operating temperature, causing the engine management system to maintain a higher idle. Other potential causes include vacuum leaks or issues with the engine control unit (ECU) settings. It's advisable to have a professional mechanic diagnose the specific cause for accurate repair.