For the P0193, there's is a possibility this is caused by a larger fuel pump WITHOUT a proper tune. If this is a stock fuel pump, the odds favor an electrical issue to the FRPS itself.
If the FRPS has already been replaced, focus on a blocked/leaking intake vacuum reference line or a wiring fault to the FRPS.
Finally, this could be a bad fuel pump or use of a fuel pump designed for a return system in a return-less application.
>> P0193 - Fuel Rail Pressure Sensor Circuit High Input (FRP)
The comprehensive component monitor (CCM) monitors the FRP sensor circuit to the PCM for high voltage. If voltage were to fall below a calibrated limit and a calibrated amount of time during testing, the test will fail. FRP signal shorted to
- VREF or VPWR.
- FRP signal open (gasoline only)
- Low fuel pressure (NG only)
- Damaged FRP sensor.
- Damaged PCM.
- High fuel pressure (caused by damaged fuel pressure regulator) NG.