Hi all, my wife's just been recovered back home in our 2006 b7 audi a4 2.0 TDI. Car died travelling up the A30, luckily no-one hurt.
Plugged in the VAG-COM and I have the same fault codes as the original post. Guess I'll be ringing Truro Audi in the morning to get the injectors changed.

I'm going to try and disconnect the faulty injector so I can drive the car to the dealer. Is it possible to identify which injector has failed from the VCDS log?

Mileage: 91410km/56799miles
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Address 01: Engine Labels: Redir Fail!
Part No SW: 03G 906 018 AQ HW: 03G 906 018 AQ
Component: R4 2.0l PPD1.3 9971
Revision: --H23--- Serial number:
Coding: 0000172
Shop #: WSC 00502 210 91535
VCID: 74E240F86E2B

2 Faults Found:
004160 - Supply Voltage A for Injectors: Circuit Malfunction
P1040 - 006 - Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 4
Fault Frequency: 1
Reset counter: 40
Mileage: 0 km
Time Indication: 0

Freeze Frame:
RPM: 2112 /min
Torque: 112.0 Nm
Speed: 113.0 km/h
Battery Volts: 108.6 V
Battery Volts: 101.7 V
Battery Volts: 94.7 V
Battery Volts: 107.6 V

008518 - Supply Voltage for Fuel Injector Group A: Open Circuit
P2146 - 009 - Open or Short to Ground
Freeze Frame:
Fault Status: 01000100
Fault Priority: 0
Fault Frequency: 4
Reset counter: 40
Mileage: 0 km
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Torque: 0.0 Nm
Speed: 0.0 km/h
Voltage: 11.64 V
Temperature: 39.0°C
Bin. Bits: 00000111
(no units): 0.0