My son and daughter in-law are having this same problem. Dealer replaced solenoids, two other shops tried too. Chrysler has a Technical Service Bulletin out (21-15-95) that implies that maybe the Accumulator need to be rebuilt (new seals and piston). They don't cost much, but labor might add a bit (2 hours?). The error codes indicate a solenoid problem, but it is really a problem with the Accumulator.
See if your dealer can look up this TSB and try this fix!
Good luck. My son is going to try this fix this week. I'll try to let you know how it goes.