What does code P1508 mean?

Q: What does code P1508 mean?

Idle Air Control Valve Closing Coil Voltage High. P1508 on a Kia means the engine control module (ECM) has detected an abnormally high voltage on the closing coil circuit of the idle air control (IAC) valve. The ECM expects a specific voltage drop across the coil when it commands the valve to close, and a reading above the threshold indicates an open circuit, a short to power, or a failed coil winding.

DTC codes / Kia codes / P1508

P1508 · KiaIdle Air Control Valve Closing Coil Voltage High

P1508 on a Kia means the engine control module (ECM) has detected an abnormally high voltage on the closing coil circuit of the idle air control (IAC) valve. The ECM expects a specific voltage drop across the coil when it commands the valve to close, and a reading above the threshold indicates an open circuit, a short to power, or a failed coil winding.

SystemPowertrain

Code typeKia specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for Kia vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.