Hyundai Elantra: Inspection - Fuel Tank Pressure Sensor (FTPS). Repair 
procedures - Engine Control System - Fuel System - Hyundai Elantra MD 2010-2015 Service manualHyundai Elantra: Inspection

1.
Connect the GDS on the Data Link Connector (DLC).
2.
Measure the output voltage of the FTPS.

Specification: Refer to "Specification"