Yes, is it 2BAR when you're pulling a shot? 2 bar when you just flushing water isn't uncommon. If my machine is idle for a WHILE(like the first shot in the morning, after being on all night waiting for me), Ill lift the lever to do my "wake-up" flush, and the water runs at 2BAR for 5-10 seconds, then goes to about 4and will stay there if I let the pump run forever. It only goes to 8.57 when Im backflushing or pulling a shot.

Try pulling a shot.. As that is the ONLY time the brew pressure gauge means anything.