This indicator light comes on after the ignition key is turned to the ON position and then it will go out after the engine is started.
This light also comes on when the EPS is not functioning properly. If it comes on while driving, have your vehicle inspected by an authorized HYUNDAI dealer.
Hyundai Tucson (LM) 2010-2015 Service Manual: CVVT Oil Control Valve (OCV) Schematic Diagrams
Circuit Diagram
(M/T)
(A/T)
...
Hyundai Tucson (LM) 2010-2015 Service Manual: Hands Free Mic Repair procedures
Inspection
1.
Disconnect the negative(-) battery terminal.
2.
Remove the roof trim.
(Refer to the BD group - "Roof trim")
3.
Remove the hands free mic (A) after loosening the connector and screws (3EA) from loof top.
4.
Check the continuity of Mic between terminals. ...