HELP with Mrs Golf needed, please

[M-A8]

Hi everyone.

As per title, I'd like to ask for your help/guidance as unfortunately I am not a very good mechanic. I understand what the errors are about (more less), but thats about it. I'm able to replace lambda sensor, solve the misfire and locate EGR, but understanding of how they relate to each other in case one of them fails is pretty equal to 0

VW Golf IV 1.4 petrol

Address 01: Engine Labels: 036-906-032-AXP.lbl
Part No: 036 906 032 L
Component: ME7.5.10 3869
Coding: 00031
Shop #: WSC 00117
VCID: 193922F183164CD67C9-5140
WVWZZZ1JZ2P272855 VWZ7Z0A4403030

4 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - Intermittent
16685 - Cylinder 1
P0301 - 35-10 - Misfire Detected - Intermittent
17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1
P1196 - 35-10 - Electrical Malfunction - Intermittent
16785 - EGR System
P0401 - 35-00 - Insufficient Flow
Readiness: 0000 0000


My first and only one for now question is: Could a misfire on a cylinder 1 possibly cause other two errors to come on, lambda and EGR, or could wrong reading on lambda sensor make EGR to not work properly and cause misfire, and finally, or could EGR cause a misfire on a cylinder 1 and lambda sensor to fail/read incorrect values????

Any input before I start digging will be VERY much appreciated

I haven't driven the car yet, but engine is just doesn't sound right. I've asked Mrs if car has less power or if she noticed any difference since the light came on the dashboard, and she said not really !!!! Really??? Don't take me wrong, but if I would remove the windscreen completely and ask if she can feel/notice any difference, the answer would be probably: Not really

And on that note I'd like to Thank You ALL for your time and any input.
Cheers