Fuel Rail Pressure Sensor codes P0191 and P0193 in Hyundai Elantra Sonata Accent Santa Fe Tucson

This 2015 Elantra was accelerating rough, was hard to start and set OBD2 P0191 and P0193 check engine codes that could have been caused by any of the following: low pressure fuel pump or filter in the tank, high pressure fuel pump on top of the engine, fuel rail pressure regulator, fuel rail pressure sensor or wiring anywhere in between. Other related codes: P0190, P0192, P0194. This videos shows the electrical diagnosis process that lead to a surprising result. 0:00 Intro 0:21 Symptoms 1:07 List of possible causes 1:31 Troubleshooting procedure 3:39 Findings 7:26 Wrap up