Possible causes – Faulty Idle Speed Control Actuator (ISCA) valve– Idle Speed Control Actuator (ISCA) valve harness is open or shorted– Idle Speed Control Actuator (ISCA) valve circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1506 HYUNDAI OBD Code Description The Idle Speed Control Actuator (ISCA) valve is…