Firstly I'm no mechanic, so apologies for the dumb questions and the lack of understanding of how cars actually work. I only drive them
Following on from a post about the gear selector lights all on and difficult gear change, it was suggested I get the car scanned. Got it done earlier this evening, and have the results. It listed quite a few, so sorry for the long post.
Chassis Type: 4D - Audi A8 D2
Scan: 01 03 08 11 15 16 17 18 25 35 37 45 55 56 57 65 67 75 76 77
02
VIN: WAUZZZ4D92N002072
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Address 01: Engine Labels: None
Part No: 4D0 907 558 AB
Component: 3.7L V8/5V G 0002
Coding: 11753
Shop #: WSC 23143
VCID: 6DDBD76D278ADF1
WAUZZZ4D92N002072 AUZ7Z0A1855153
6 Faults Found:
17831 - Secondary Air Injection System; Bank 1
P1423 - 35-00 - Insufficient Flow
17819 - Secondary Air Injection System; Bank 2
P1411 - 35-00 - Insufficient Flow
16500 - Engine Coolant Temp. Sensor (G62)
P0116 - 35-10 - Implausible Signal - Intermittent
17538 - Fuel Trim; Bank 2 (Mult)
P1130 - 35-10 - System too Lean - Intermittent
17536 - Fuel Trim; Bank 1 (Mult)
P1128 - 35-10 - System too Lean - Intermittent
17521 - Oxygen (Lambda) Sensor; B1 S1
P1113 - 35-10 - Internal Resistance too High - Intermittent
Readiness: 0010 0101
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Address 03: ABS Brakes Labels: 8D0-907-389.lbl
Part No: 4D0 907 389 E
Component: ABS/ESP allrad D56
Coding: 08397
Shop #: WSC 02313
VCID: 31630B1DFB327B1
2 Faults Found:
01435 - Brake Pressure Sensor 1 (G201)
48-10 - Supply Voltage - Intermittent
01119 - Gear Recognition Signal
35-10 - - - Intermittent
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Address 08: Auto HVAC Labels: 4D0-820-043-MYX.lbl
Part No: 4D0 820 043 P
Component: A8-Klimavollautomat D11
Coding: 00081
Shop #: WSC 00315
VCID: 2953E37DD3E2031
No fault code found.
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Address 15: Airbags Labels: 4D0-959-655-AI8.lbl
Part No: 4D0 959 655 T
Component: Airbag Front+Kopf 5001
Coding: 01417
Shop #: WSC 02335
VCID: 438F51D5518EF91
No fault code found.
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Address 17: Instruments Labels: 4D0-919-033-MYX.lbl
Part No: 4D0 919 035 AQ
Component: KOMBI+WEGFAHRS.VDO D37
Coding: 16483
Shop #: WSC 00209
VCID: 75EBFF0D4FDA171
WAUZZZ4D92N002072 AUZ7Z0A1855153
No fault code found.
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Address 35: Centr. Locks Labels: 8D0-862-257.lbl
Part No: 8L0 862 257 P
Component: CV-Pump, Alarm, RC D17
Coding: 15179
Shop #: WSC 00315
VCID: 428154D14E94F09
1 Fault Found:
01134 - Alarm Horn (H12)
49-00 - No Communications
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Address 37: Navigation Labels: 4B0-035-192-RNSD-37.lbl
Part No: 4D0 035 192 N
Component: RNS 4.1 H05 BNO 0017
VCID: 2A511C71D6E4089
1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
49-10 - No Communications - Intermittent
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Address 56: Radio Labels: 4B0-035-192-RNSD-56.lbl
Part No: 4D0 035 192 N
Component: Radio BNO 0001
Coding: 00205
Shop #: WSC 02314
VCID: 2A511C71D6E4089
1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
49-10 - No Communications - Intermittent
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Address 57: TV Tuner Labels: 4D0-919-146.clb
Part No: 4D0 919 146 B
Component: TV Tuner H06 0704
Coding: 0000030
Shop #: WSC 00000 000 00000
VCID: 2855E67998E83A9
No fault code found.
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Address 76: Park Assist Labels: 4D0-919-283.lbl
Part No: 4D0 919 283
Component: Parkingsystem A8 RDW D07
Coding: 01108
Shop #: WSC 00209
VCID: E8D5267988687A9
No fault code found.
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Address 02: Auto Trans Labels: 01V-927-156.lbl
Part No: 4D0 927 156 DT
Component: AG5 01V 3.7l5V RdW 1920
Coding: 00001
Shop #: WSC 00000
VCID: 7EF9E0217AEC549
1 Fault Found:
17090 - Transmission Range Sensor (F125)
P0706 - 35-10 - Implausible Signal - Intermittent
I'm not sure what's relevant and what's not, so decided to post the lot, rather than try to shorten it.
So far as I can tell, the car runs great. It turns over instantly and sounds sweet as. I think the performance is great, but then I've never driven a 3.7 V8 before. Fuel consumption averages 25mpg. Drives fine at all speeds, from town to motorway, and cruising at 80mph for a hour or so. S mode's brilliant when overtaking. No issues with brakes that I'm aware of. Alarm horn definitely doesn't work. No issues with radio or navigation. The only issues that I am aware of that don't throw up an error is that something is blowing the fuse for the interior lights - can replace it, but will blow 24-48 hours later. I also have a small rattle from the drivers door and noticed the other night that the rear window isolation switch was flickering, so that may be the culprit.
However, I suppose what I'm looking for is any pointers on what to attack first. Obviously the engine codes are priority, but could one be a knock-on from something else?