A month ago I replaced a failing fuel pump, changed the fuel filter, and the fuel rail pressure sensor. I now have P0193 "Fuel Rail Sensor High Circuit Input". The car runs fine for the most part, and when I turn off the check engine line it runs with 0 issues. I've warrantied the sensor, and the problem remained. My fuel pressure will be at ~36 Key on engine off, and when I start it, especially after I have reset the check engine light, it will be around 40 while running and driving, however once it heats up it gets up around 65, and when my car has the check engine light on and is running at standard operating temp is can be upwards of 90 PSI. my OBD-II reader says that my Catalyst is failing emission test, could a clogged cat be causing my fuel pressure to spike like this? I have tried everything besides working with the Cat, and I don't know what else to do.