That code is specific to a leak or what is perceived as a leak. A faulty accumulator pressure sensor can cause it as well. Chances are there is a leak in the accumulator, but to be sure, it needs to be checked.
If you look at the attachments below, they provide the diagnostics for this code. Take a look through them and let me know if they help.
If you find it needs replaced, the remaining pics below are the removal and install directions specific to this vehicle.
If you have other questions, let me know.
See pics below.
Images (Click to enlarge)
Saturday, May 1st, 2021 AT 10:53 PM