There are a few things that can cause these DTC's to set. A failing fuel pump not delivering adequate fuel pressure, An intake air leak letting in unmetered air, that is any air that enters into the combustion chambers past the MAF Sensor, or in your vehicles case after the MAP sensor. There really is no way to pin down what the problem is without going through a process of elimination.
Fortunately, we have the factory troubleshooting guide for both DTC P0174 and P2237 for you in the diagrams down below. In the guide it talks about using your HDS. This is a tool that Honda/Acura dealership Techs use. You should be able to do the same thing with a code reader. Please go through these two guides and get back to us with what you find out.
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Sunday, March 17th, 2019 AT 8:49 AM