edit: found a document containing a complete list, however some of the translation is a little dodgy
http://pics.tdiclub.com/data/500/5297vag_codes_english.docFull list of VAGCOM error codes:
00000 No DTC Recognized
00257 ABS Inlet Valve - Left Front (N101)
00258 Shift Solenoid 1 - Open Circuit or Short to Ground or B+ (N88)
00259 ABS Inlet Valve - Right Front (N99)
00260 Shift Solenoid 2 - Open Circuit or Short to Ground or B+ (N89)
00261 ABS Inlet Valve - Rear (N103)
00262 Shift Solenoid 3 - Open Circuit or Short to Ground or B+ (N90)
00263 Transmission 0107 - Mechanical/Hydraulic Malfunction
00264 Shift Solenoid 4 - Open Circuit or Short to Ground or B+ (N91)
00265 ABS Outlet Valve - Left Front (N102)
00266 Shift Solenoid 5 - Open Circuit or Short to Ground or B+ (N92)
00267 ABS Outlet - Right Front (N100)
00268 Shift Solenoid 6 - Open Circuit or Short to Ground or B+ (N93)
00269 ABS Outlet Valve - Rear (N104)
00270 Shift Solenoid 7 - Open Circuit or Short to Ground or B+ (N94)
00271 See VW or Audi Service Manual, Repair Group 01 (Depends on Which Vehicle Is under Test)
00273 ABS Inlet Valve - Right Rear (N133
00274 ABS Outlet Valve - Left Rear (N134)
00275 ABS Outlet Valve - Right Rear (N135)
00276 ABS Outlet Valve - Right Rear (N136)
00277 ABS Inlet or Outlet Valve - Left Front (N137)
00278 ABS Main Valve (N105)
00279 Differential Lock Valve 1 (N125)
00280 Differential Lock Valve 2 (N126)
00281 Vehicle Speed Sensor - No Signal (G68)
00282 Throttle Position Actuator -V60
00283 ABS Wheel Speed Signal #1 (Left Front) - Range/Performance - G47
00284 ABS Inlet or Outlet Valve - Right Front - N138
00285 ABS Wheel Speed Signal #2 (Right Front) - Range/Performance - G45
00286 ABS Inlet or Outlet Valve - Left Front - N139
00287 ABS Wheel Speed Signal #3 (Right Rear) - Range/Performance (G44)
00289 ABS Inlet or Outlet Valve - Right Rear (N140)
00290 ABS Wheel Speed Signal #4 (Left Rear) - Range/Performance. (G46)
00291 Pressure / Fluid Level Warning Switch (F116 / F117)
00292 Hydraulic Energy Supply Pressure Level
00293 Multi-Function Transmission Range Switch - Malfunction (PRNDL Input) (F125)
00294 Transmission Pressure Switch L (F174)
00295 Transmission Pressure Switch 2 (F175)
00296 Kick-down Switch - Short to ground (F
00297 Input/Turbine Speed Sensor Circuit - Malfunction
00297 Vehicle Speed Sensor Circuit - Range/Performance - Signal Noisy (G38) A
00297 Vehicle Speed Sensor Circuit - No Signal A
00297 Transmission Vehicle Speed Sensor (G38)
00298 Rear Differential Lock Switch -E121
00299 Transmission Shift-Range Program Switch - Short Circuit -E122
00300 Transmission Fluid Temperature Sensor Circuit Low Input (G93)
00300 Transmission Fluid Temperature Sensor Circuit High Input (G93)
00301 ABS Return-flow Pump (V39)
00302 ABS Solenoid Valve Relay (J106)
00303 Board Computer Function Selector Switch (E91)
00305 Fuel Consumption Indicator Signal
00306 Secondary Air Injection - Cylinder Bank 1
00307 Secondary Air Injection - Cylinder Bank 2
00309 Cleaning Solution Metering Pump (V135)
00310 Catalytic Convertor Temperature Sensors (G20)
00312 Catalytic Convertor Control Temperature Sensors (G132)
00313 Three Way Catalytic Converter - Signal Malfunction
00314 EGR Two Way Valve (N161)
00447 ABS-ASR Motor - Electrical Connection 2
00501 Central Flap Motor Position Sensor -G92
00512 Cam Sensor - Signal Error B
00512 Camshaft Position Sensor - Not on Reference Mark
00513 Engine Speed Sensor - G28 - Idle RPM Too Low B
00513 Engine Speed Sensor - G28 - Idle RPM Too High B
00513 Engine Speed Sensor - G28 - Signal Malfunction
00514 Crankshaft Position Sensor - Erratic Signal - G4 A
00514 Crankshaft Position Sensor - G4
00515 Camshaft Position Sensor (Hall Effect Sensor) - No Signal (G40) : Check CMP, if OK, replace distributor. B
00515 Camshaft Position Sensor (Hall Effect Sensor) - Short to B+ (G40) : Check CMP, if OK, replace distributor. B
00516 Throttle Position Sensor - Closed Switch -F60
00517 Throttle Position Sensor - Wide-open Switch -F81
00518 Throttle Position Sensor - Signal Out of Range (G69) Also check for loose ECM power relay.
00519 MAP Sensor - Out of Range -G71 B
00519 MAP Sensor - Voltage Low -G71 A
00519 MAP Sensor - Voltage High -G71 A
00520 Volume Mass Air Flow Sensor -G19ig70
00521 Co Fuel Trim Potentiometer -G74
00522 Engine Coolant Temperature Sensor -G62
00523 IAT Sensor - Temp High - Circuit Low - G42 A
00523 IAT Sensor - Temp Low - Circuit High - G42 A
00524 Knock Sensor 1 -G61
00525 O2 Sensor - Voltage Low -G39 B
00526 Brake Light Switch - Incorrect signal (F)
00527 Intake Air Temperature Sensor - G72
00528 Barometric Pressure Sensor - F96
00529 Engine Speed Input Circuit (RPM Sensor) - Malfunction. Also check for loose ECM power relay. A
00529 Engine Speed Input Circuit (RPM Sensor) - No Signal
00530 Throttle Position Sensor -G88
00531 Mass Air Flow Sensor Reference Voltage
00532 Transmission Control Module Relay - Supply Voltage (B+) Malfunction Low Battery or Bad Ground
00532 Supply Voltage (B+)
00533 Idle Air Control Regulation
00534 Oil Temperature Sensor -G8
00535 First Knock Sensor
00536 Second Knock Sensor
00537 Oxygen Sensor Control
00538 Reference Voltage
00539 Fuel Temperature Sensor -G81
00540 Knock Sensor 2 -G66
00541 Slide Travel Sensor -G99
00542 Needle Lift Sensor -G80
00543 Engine Speed Input Circuit - RPM Upper Limit Exceeded
00544 Maximum Charge Air Pressure Exceeded
00545 Engine Intervention Unreadable. Also check for loose ECM power relay.
00545 Engine Intervention Stuck Off. Also check for loose ECM power relay.
00545 Engine Intervention Stuck On. Also check for loose ECM power relay.
00546 Data Communication Line Faulty
00547 ABS Pressure Control Switch -F137
00548 System Voltage Malfunction
00549 Fuel Consumption Signal
00549 Load Signal Stuck Off (RPM Signal missing)
00549 Load Signal Stuck On (RPM Signal missing)
00550 Injection Start Control
00551 Catalytic Convertor Excess Temperature
00552 Volume Air Flow Sensor (Position Sensor) -G19
00553 Mass Air Flow Sensor -G70
00554 Oxygen Sensor 2 - Control
00555 Heating Circuit - Oxygen Sensor 2 -G108
00558 Mixture Control Adjustment Limit - Lean Position
00559 Mixture Control Adjustment Limit - Rich Position
00560 EGR Temperature Sensor Switch Short or Implausible Value
00561 Mixture Adjustment Control
00575 Manifold Absolute Pressure Sensor
00577 Knock Sensor Control - Cylinder 1
00578 Knock Sensor Control - Cylinder 2
00579 Knock Sensor Control - Cylinder 3
00580 Knock Sensor Control - Cylinder 4
00581 Knock Sensor Control - Cylinder 5
00582 Knock Sensor Control - Cylinder 6
00583 Knock Sensor Control - Cylinder 7
00584 Knock Sensor Control - Cylinder 8
00585 EGR Temperature Sensor - G98
00586 EGR System Control
00587 Mixture Control Adjustment Limit - Bad ECU ground, Air leak, Leaking Injector.
00588 Air-bag Ignition Circuit - Driver Side -N95
00589 Air-bag Ignition Circuit 1 - Passenger Side -N131
00590 Air-bag Ignition Circuit 1 - Passenger Side -N132
00591 Seat Belt Tensioner Switch - E24
00592 Seat Smelt Tensioner Switch - E25
00593 Seat Detect Switch - Passenger Side -F151
00594 Air-bag Ignition Circuit
00595 Crash Data Already Stored
00596 Injector or Trans. Solenoid Wires - Short
00597 Varying ABS Wheel Speed Signals - Range/Performance
00598 Hydraulic/Mechanical Malfunction
00599 Possibility-pressure Brake Light Switch
00600 Temperature Regulator Flap Motor Position Sensor -G92
00602 Foot-wall/defroster. Flap Motor Position Sensor -G114
00603 Foot-wall/defroster Flap Motor -V85
00604 Back Pressure Flap Motor Position Sensor -G113
00605 Fresh Air Recirculation Flap Two-way Valve -N63
00606 Engine Coolant Two-way Valve -N147
00607 Outside Air Temperature Display -G106
00608 Load Sensor -G119
00609 Ignition Output 1
00610 Ignition Output 2
00611 Ignition Output 3
00612 Ignition Output 4
00613 Ignition Output 5
00614 Ignition Output 6
00615 Ignition Output 7
00616 Ignition Output 8
00617 Air-bag Deceleration Sensor - Left -G104
00618 Air-bag Deceleration Sensor - Right -G105
00619 Sensor Supply Line - Left
00620 Sensor Supply Line - Right
00621 Pressure Reduction Valve -N155
00622 Draining Water from Fuel Filter
00623 ABS/Transmission Electrical Connection
00624 A/C Compressor Engagement
00625 Vehicle Speed Signal
00626 Glow Plug Indicator Light -29
00627 Water Level Sensor -G120
00628 Actuating Variable Control
00629 Vacuum Vent Valve - Brake -F47
00630 A/C Switched on
00633 Wiring to Ignition/sensor for Delay
00634 Series Resistance -N159
00635 Oxygen Sensor Heating Circuit - Ahead of Catalytic Convertor
00636 Acceleration Sensor - Right Front - G121
00637 Acceleration Sensor - Left Front - G122
00638 Throttle Angle Signal - Stuck Off. Also check for loose ECM power relay.
00638 Throttle Angle Signal - Stuck On. Also check for loose ECM power relay.
00638 Engine/Transmission Electrical Connection 2. Also check for loose ECM power relay.
00639 Deceleration Sensor -G123
00640 Oxygen Sensor Heating Relay -J278
00641 ATF-Temperature too High
00642 EDL Switch-over Valve - Right Front - N166
00643 EDL Outlet Valve - Right Front - N167
00644 EDL Switch-over Valve - Left Front -N168
00645 EDL Outlet Valve - Left Front - N169
00646 ABS-ASR Motor - Electrical Connection 1
00648 Oxygen Sensor Heating Circuit - Behind Catalytic Convertor
00649 ABS Inlet/outlet Valve - Rear -N160
00650 Clutch Vacuum Vent Valve Switch -F36
00651 Ignition Wiring
00652 Transmission Shift-Range Controller - Incorrect Gear Ratio
00652 Transmission Shift-Range Controller - Gear #1 - Incorrect Ratio
00652 Transmission Shift-Range Controller - Gear #2 - Incorrect Ratio
00652 Transmission Shift-Range Controller - Gear #3 - Incorrect Ratio
00652 Transmission Shift-Range Controller - Gear #4 - Incorrect Ratio