Possible causes – Engine Light ON (or Service Engine Soon Warning Light) Tech description – 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 P1508 HYUNDAI OBD Code Description The Idle Speed Control Actuator (ISCA) valve…