You have a fuel rail, pipe, that goes around the top of the engine and feeds each injector. On the rail will be a pressure regulator, and a pressure sensor. There will also a be a tire valve for checking pressure. If you reset the light and it comes back on, you have a problem. Do you have a bad sensor, or a bad regulator? Check the vacuum line to the regulator, may be broken or have come off. You need a "fuel pressure gauge" to check the pressure with, not a tire gauge. You also need the specs. Most fuel pumps will do about about 90 psi, but the regulator holds around 40. If you take it in, make sure the light is on, makes finding the problem for the tech faster. Should be an hour or so labor plus parts.
Since it is an engine code, any good shop should be able to fix it. Your problem is not related to RV.
New cars do not fix themselves, you still have to know what is going on and what to check for each of the over 1000 possible codes.
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