Currently have faults L341-347, usually pops up as just L347, I do not have diagnostics to check sensors, but I'm assuming if it was the redundant pressure sensors attached to brake valve I would get fault L342. When you checked accumulator did oil come out? I just checked mine, no oil, no gas hissing, I'm assuming it needs to be charged with nitrogen or does this means it could be the charging valve 2Y10? Maybe I checked it wrong, slowly loosened hex bolt on top of accumulator, were there any other conditions that needed to be met?