P008A code: how low is too low fuel pressure?

[GJarrett]

While datalogging some WOT pulls for my tuner, my Ecoboost threw a P008A "low pressure fuel system pressure too low" code. The datalogs show the low side fuel pressure momentarily dipped to 42 psi at its lowest point which seemed okay to me(?) How low is too low and at what psi level does it throw that code? Should I be worried about 42 psi?

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