Got the P1681 after simply reading my 4Z7907551S (2004 Allroad 2.7T manual). Did some searching on this site and came upon this thread. Flashed the 4Z7907551R.bin into my ECU. It did indeed get the car to start again but introduced a bunch of new codes:
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Address 08: Auto HVAC Labels: 4B0-820-043-MY2.lbl
Part No: 4B0 820 043 AQ
Component: A6-Klimavollautomat 0208
Coding: 00010
Shop #: WSC 06133
1 Fault Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
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Address 17: Instruments Labels: 4B0-920-xxx-17.lbl
Part No: 4B0 920 983 FX
Component: KOMBI+WEGFAHRS. VDO D17
Coding: 00264
Shop #: WSC 06133
1 Fault Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
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Address 34: Level Control Labels: 4Z7-907-553.lbl
Part No: 4Z7 907 553 F
Component: - 2C1A1 D060
Coding: 25500
Shop #: WSC 02334
1 Fault Found:
01577 - Turn-Off due to Over-Temp
35-10 - - - Intermittent
Needless to say I was not happy at all and began to look for the ways to fix my original 4Z7907551S.bin. Came across this thread:
http://nefariousmotorsports.com/forum/index.php?topic=6719.0, edited that one byte, reflashed the original 4Z7907551S.bin into my ECU and the car started from a quarter turn and been running great ever since.
BTW, not only did the 4Z7907551R.bin introduce new codes, it eliminated a few that were set off by my deleting of the SAI system, both EGT sensors and both post-cat OXS sensors.
With the original 4Z7907551S.bin:
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Address 01: Engine Labels: 078-907-551-AZA.lbl
Part No: 4Z7 907 551 S
Component: 2.7L V6/5VT G 0020
Coding: 07715
Shop #: WSC 02335
7 Faults Found:
17840 - Secondary Air Injection Solenoid Valve (N112)
P1432 - 35-00 - Open Circuit
17530 - Oxygen (Lambda) Sensor Heating; B2 S2
P1122 - 35-00 - Open Circuit
17526 - Oxygen (Lambda) Sensor Heating; B1 S2
P1118 - 35-00 - Open Circuit
17861 - Exhaust Gas Temp Sensor 1 (G235)
P1453 - 35-10 - Open or Short to Plus - Intermittent
17865 - Exhaust Gas Temp Sensor 2 (G236)
P1457 - 35-10 - Open or Short to Plus - Intermittent
17522 - Oxygen (Lambda) Sensor; B1 S2
P1114 - 35-00 - Internal Resistance too High
17548 - Oxygen (Lambda) Sensor; B2 S2
P1140 - 35-00 - Internal Resistance too High
Readiness: 0010 1001
vs. with the 4Z7907551R.bin flashed into my ECU:
-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AZA.lbl
Part No: 4Z7 907 551 R
Component: 2.7L V6/5VT G 0003
Coding: 07715
Shop #: WSC 02335
3 Faults Found:
17840 - Secondary Air Injection Solenoid Valve (N112)
P1432 - 35-00 - Open Circuit
17530 - Oxygen (Lambda) Sensor Heating; B2 S2
P1122 - 35-00 - Open Circuit
17526 - Oxygen (Lambda) Sensor Heating; B1 S2
P1118 - 35-00 - Open Circuit
Readiness: 0110 1101
In the hex editor the 4Z7907551S.bin and the 4Z7907551R.bin also appear to be rather different. I am glad I am able to use my original 4Z7907551S.bin again.