Hi All.
I am new to the forums, so I apologise if this doesn't read too well, but looking forward to helping people out in the future.
I have a 2009 A4 2.0 TDi S-line 170ps 6-speed manual Start/Stop - Current mileage 134500 (NOT QUATTRO)
Previously, I had a problem with a failed DFP sensor, which cost me £50 by the roadside, nearly 2.5 years ago. (Just after I had it)
Whilst on my home on Saturday, I had the Emissions Control Light come on again. 
So, after the information i had from the VW Audi RAC guy who attended last time, I decided I would not risk driving it so I wouldn't risk clogging the DPF, just in case the same sensor had become clogged or failed.
However, I have had the car plugged in at the garage today (my old VAGCOM cable I had wont talk with my car) and it has thrown up a number of error codes on the intake side. This came as a kind of relief that the DPF isn't dead.
The car has been running fine the last few weeks and has been driven over 1000 miles in the last 2 weeks, mostly motorway driving.
Servicing is done on a long life service, as and when required with castrol edge oil. Air filter was replaced on the last service. Fuel filter was last replaced on the previous service.
I have looked up the codes (detailed below) and wondered if any of you guys could shed any light on it.
The garage has cleared the codes and advised they will re-check when it goes in for new brakes on Friday. 
P1603 - Internal Control module Failed (Think this was caused by me trying my old cable)
The below is some further info I sourced off the web and I apologise for the way it is written, but I had to convert the info from Dutch to English.....
Error code decriptions:
Error Code: 18440 P2008
This error code is " Generic OBD " ( for each automaker same description and meaning).
The following symptoms / causes / solutions are specific to VAG cars ; to other car manufacturers who may differ in detail.
nl Valve Intake Manifold 1 Airflow Control for electrical fault in circuit
du Saugrohrklappe 1 für Luftstromsteuerung elektrischer Fehler im Kreis Strom
and Intake Manifold Flap, Bank 1 Circuit / Open - MIL On
Additional information on the error codes
Possible symptoms :
ERROR lamp (MIL) lights
Possible causes:
Fuse (s ) are poorly connected or defective
B + terminal 30 and B + terminal 15 is defective
Valve is contaminated
Valve is stuck
Wiring and / or connections to / from the control valve defect
Valve control does not work (properly)
Possible solutions:
Check / replace fuse (s)
remove the fuse (s) out
Make the ends of the fuse (s) clean (very light sanding with fine sandpaper , then very little contact spray on it)
fuse (s ) by measuring with a multimeter ( the fuse (s ) sometimes looks fine , but appearances can be deceiving )
fuse (s) replace / replace
Check B + B + terminal 30 and terminal 15
Check postition valve ( measuring blocks ) / Replace Valve
Disassemble the valve and clean him
Extra info :
These are the valves in the intake manifold. These sit there for part load, a tdi has through this way stratified
combustion = more economical. link , link . So to see something with the adjustment.
Flashy nothing serious as long as they are open , it does not cost . And in consumption also is not so bad .
This gives no lights etc in the dashboard. If you have full power , you can just drive
--------------------------------------------------
Layout Code : P15A1
This error code is " Manufacturer Specific " ( for each automaker a different description and meaning). The following
description / symptoms / causes / solutions are specific to VAG cars.
nl Sensor Neutral Position unlikely signal
du and Neutral position (NP ) sensor implausible signal
Additional information on the error codes
Possible symptoms :
ERROR lamp (MIL) lights
Possible causes:
Wiring and / or connections faulty
sensor defective
Possible solutions:
Check / repair wiring and connections
Check ( measuring blocks ) / replace Sensor
----------------------------------------------------
Error Code: 18441 P2009
This error code is " Generic OBD " ( for each automaker same description and meaning). The following symptoms / causes /
solutions are specific to VAG cars ; to other car manufacturers who may differ in detail.
nl Valve Intake Manifold 1 for Airflow Control signal is too weak
du Saugrohrklappe 1 für Luftstromsteuerung Signal zu klein
and Intake Manifold Flap ; Bank 1 Short to Ground - MIL ON
Additional information on the error codes
Possible symptoms :
ERROR lamp (MIL) lights
Possible causes:
Fuse (s ) are poorly connected or defective
B + terminal 30 and B + terminal 15 is defective
Valve is contaminated
Valve is stuck
Wiring and / or connections to / from the control valve defect
Valve control does not work (properly)
Possible solutions:
Check / replace fuse (s)
remove the fuse (s) out
Make the ends of the fuse (s) clean (very light sanding with fine sandpaper , then very little contact spray on it)
fuse (s ) by measuring with a multimeter ( the fuse (s ) sometimes looks fine , but appearances can be deceiving ) fuse (s) replace / replace
Check B + B + terminal 30 and terminal 15
Check postition valve ( measuring blocks ) / Replace Valve
Disassemble the valve and clean him
Extra info :
These are the valves in the intake manifold. These sit there for part load, a tdi has through this way stratified
combustion = more economical. link , link . So to see something with the adjustment. Flashy nothing serious as long
as they are open , it does not cost . And in consumption also is not so bad . This gives no lights etc in the dashboard.
If you have full power , you can just drive
Read this post on the audiforum.nl
-----------------------------------------------------------
Error Code: 17424 P1016
This error code is " Manufacturer Specific " ( for each automaker a different description and meaning). The following
description / symptoms / causes / solutions are specific to VAG cars.
nl valve for filter bypass valve ( N275 ) interruption
du Ventil für Bypass Klappe Luftfilter ( N275 ) Unterbrechung
and Bypass Flap filter valve ( N275 ) Open Circuit
Additional information on the error codes
Possible symptoms :
unknown
Possible causes:
Wiring and / or connections faulty
( N275 ) faulty
Possible solutions:
Check the wiring and all connections
Check ( measuring blocks ) / replace ( N275 )
------------------------------------------------------------
Error Code: 16484 P0100 (the corresponding 'old VAG code' is: 00553)
This error code is "Generic OBD" (for each
automaker same description and meaning). The following symptoms / causes / solutions
are specific to VAG cars; to other car manufacturers who may differ in detail.
nl Air Flow Sensor (G70) supply
du Saugrohrdruck (G70) Anschlußspannung
and Mass Air Flow (MAF) (G70) Supply Voltage
Additional information on the error codes
Possible symptoms:
Probably no real serious problems
reduced ability
Infrequent / rough running
Engine stalls
Fuel consumption too high
exhaust smokes
ERROR lamp (MIL) lights
Possible causes:
This error code is usually caused when you plug the LMM disconnecting and then turn it on contact. The ECU sees no LMM more
Fuse (s) are poorly connected or defective
Check whether the MAS is not too close to a) ignition / bobinedraden solenoid valve, c) relays, d) motor
Bad contacts to / from the LMM (check especially the connection to the ECU)
Check for leaks past the LMM
The air filter is clogged (leak in the air intake)
Exhaust is blocked
Correct values for the LMM are ao calculated on the basis of the values that pass the MAP sensor. So check the MAPsensor:
MAP sensor itself
Wiring and / or connections faulty
Leakage to / from the MAP sensor
The LMM is polluted
if you use a reusable air filter that is soaked in oil, beware that there is not too much oil is (Just standard)
The LMM (G70) is broken
Possible solutions:
Error codes in the LMM are sometimes difficult to solve / able to put you on the wrong track
Reset the error code, and hope he does not come back
Before replacing the LMM (G70), first try the following once, maybe it helps:
Replace the air filter
make the MAS clean (blow or special cleaner), it does not often, but you never know
reset error codes
Check / replace fuse (s) remove the fuse (s) Make the ends of the fuse (s) clean (very light sanding with fine sandpaper, then very little contact spray on it)
fuse (s) by measuring with a multimeter (the fuse (s) sometimes looks fine, but appearances can be deceiving
fuse (s) replace / replace
Check the exhaust for blockage
Check / repair wiring and connections to / from the LMM
Check for leaks around the LMM
Check the voltage of the LMM
Check (measuring blocks) / replace LMM
Check (measuring blocks) / replace the MAP sensor
The dealer if there is a software update for the error check
The ECU, replace but that is the last solution
Extra info:
LMM (G70)
Air pressure sensor in the intake manifold / MAP sensor (G71)
For model years 1995-2004 (?), The TDI VAG a
bad reputation for the MAS. Which is slowly dirty and dirty (not easy to clean), and loses slowly (!)
Functionality, somewhat irregular course and loss of ability as a result. The functionality can be tested
by using [01 engine] a log, [meas.blocks-08], group 003 (3rd gear, floored by 1700-4000rpm)].
I appreciate you taking the time to look at this for me. :P
As a side note, have any of you had issues with wear on the drive shafts? I have had 2 inner cv's done this year and the outer on the O/S is now knocking. :(
Rob.
