Hi, NEED some help with my A6 C6

alexthe1

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Hi, i need some technical help

Early diagnostic with a va scanner showed

Evaporative Emission System Leak Detection Pump, circuit Range Performance
02 Sensor Bank1 Sensor1, Malfunction
02 Sensor Reference Voltage Circuit Bank1 Sensor1, Open
Bank1, Sensor1, Heater Circuit, Electrical Malfunction
Intake Manifold Runner Control Bank1 Stuck Closed
Bank1 Camshaft Position, Timing Over-Advanced or System Performance
Camshaft Position Sensor B Circ, Bank1, Range Performance

The valve cover gasket seem to have an issue oil was leaking

I changed

Valve cover gasket on both sides
Purge valve solenoid
Spark plugs ngk ruthenium
Bank1 camshaft position sensor (under fuel pressure sensor)
EGR vacuum Solenoid Valve

The battery stayed connected for a 2 week duration while i changed the parts
I disconnected fuel line and taped both sides from day 1 while i kept opening
and closing driver door for 2 weeks with the battery on, i think that caused an issue..
After that i started the car test drove 10mn, everything seemed a bit better , parked the car
for 10mn, the car had trouble starting and was dying after 30sec it drives only a few meters then dies off..

Scan 2 weeks later

009220 EVAP Leak Detection Pump Sense Circuit
P2404 - 006 - Implausible Signal

000304 Oxygen (Lambda) Sensor B1 S1
P0130 - 006 - Malfunction in Circuit - Intermittent

008771 Oxygen (Lambda) Sensor B1 S1
P2243 - 006 - Reference Voltage Open Circuit

008198 Intake Manifold Flap; Bank 1
P2006 - 006 - Stuck Closed - Intermittent

008196 Intake Manifold Flap; Bank 1
P2004 - 007 - Stuck Open - Intermittent

004176 Bank1; Exhaust Cam Adjustment Valve 1 (N318)
P1050 - 009 - Open Circuit - Intermittent

004180 Bank2; Exhaust Cam Adjustment Valve 2 (N319)
P1054 - 009 - Open Circuit - Intermittent

000139 Low Pressure Fuel System
P008B - 006 - Pressure too High - MIL ON

I Also have 5 codes from Battery Regulator Quiescent Current Stage 1 to 5

What i am thinking about replacing ?

-Oxygen sensor
-Evap Leak Detection Pump
-Intake manifold runner control actuator
-2 VVT Solenoid ( bank1/bank2 )
-Intake Manifold Position Sensor
-Battery voltage regulator
-Vacuum Hose
-Fuel pressure senor

Any Advice would be helpful

Thanks