Megane vvt 1.6 2004 / low fuel pressure

Hello has a diagnostic done on my megane

1.6 vvt 2004 and it showed up low fuel pressure

Also drivers air bag circuit 1 and 2 . I'm

Totally lost now can someone tell me where

To start I have replaced cam sensor . Crank sensor .

Oil Dysphasia . Spark plugs . Coils .

Is this a common problem or just bad luck