A8 D3 2003 intermitent remote unlocking issue
 

Had an ongoing problem with my car for a while now. Most of the time my remote lock and unlock worked fine from the keyfob.

Every once in a while it wont unlock - even though the remote is working - and I have to open the car with the key. Once the door is unloacked by key and opened the remote will imediately work to lock and unlock the system.

I have noticed, eventually, on the times where I have had to unlock with the key, the battery monitor is always at 10%. This will then gradually charge back to 100% over the next 40 to 60 minutes drive.

I always starts just fine at 10%

On good days where the remote unlocks the car the battery monitor is always showing 100% - even after being parked for a few days.

Any ideas what could be draining the battery whilst parked and causing the remote unlock to fail?

Sounds like an intermittent fault draining the battery. If you have access to VCDS or other scan tool, it should identify if a door handle (most likely) or something else is causing the drain.

These are my codes (cut down to just faults). The window regulators all went wrong on a very cold morning after not being used for ages becuase of lockdowns. I think a lot of the intermittent battery warnings were when I disconnected one terminal of the battery?

When I pulled these codes I turned off the radio and the heater/AC. There was an occasional clicking from the dash or perhaps under the bonnet. I thought maybe a heater flap type sound? Only with ignition on though.

Monday,21,February,2022,17:14:22:16365
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 21.9.0.2 (x64) HEX-V2 CB: 0.4555.4
Data version: 20210903 DS330.0
www.Ross-Tech.com


VIN: License Plate:
Mileage: 148260km-92124mi Repair Order:



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 4E (4E0)
Scan: 01 02 03 05 06 07 08 09 0F 15 16 17 19 1E 25 34 36 37 38 42
46 47 4F 52 53 55 56 57 61 62 72 76 77

VIN: Mileage: 148260km-92124miles

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
05-Acc/Start Auth. -- Status: Malfunction 0010
06-Seat Mem. Pass -- Status: Malfunction 0010
07-Control Head -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: OK 0000
0F-Digital Radio -- Status: Not registered 0001
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
1E-Media Player 2 -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
34-Level Control -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: OK 0000
38-Roof Electronics -- Status: OK 0000
42-Door Elect, Driver -- Status: Malfunction 0010
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: Malfunction 0010
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: Malfunction 0010
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
57-TV Tuner -- Status: OK 0000
61-Battery Regul. -- Status: Malfunction 0010
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: Malfunction 0010
76-Park Assist -- Status: Malfunction 0010
77-Telephone -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine Labels: None
Part No SW: 4E0 910 560 D HW: 4E0 907 560
Component: 3.7L V8/5V G 0060
Revision: 00000000 Serial number: AUX3Z0BD106427
Coding: 0011773
Shop #: WSC 02312 785 00200
VCID: 221DEA9598CC0FCB915-8076
VINID: 9D196AAAA1150037800042450408B0B457

2 Faults Found
17979 - Left Engine Mount Solenoid Valve (N144)
P1571 - 001 - Short to Plus
18284 - Valve for Torque Support Mount
P1876 - 004 - Open Circuit
Readiness: 0000 1100

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. Labels: 4E0-910-131.lbl
Part No SW: 4E0 910 131 HW: 4E0 909 131
Component: FBS AUDID3 H01 0070
Revision: 00703201 Serial number: AUX3Z0BD106427
Coding: 0264192
Shop #: WSC 02311 785 00200
VCID: 58E9887D8E10951BBF1-800C

Subsystem 1 - Part No: XXXXXXXXXXX
Component: ELV XXXX

1 Fault Found
00172 - Key 2 not learned
008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 5
Fault Frequency: 0
Reset counter: 182
Mileage: 237776 km
Time Indication: 0
Date: 2022.01.27
Time: 16:18:40


-------------------------------------------------------------------------------
Address 06: Seat Mem. Pass Labels: None
Part No SW: 4E0 910 760 B HW: 4E0 959 760
Component: Sitzmemory BFS H05 0020
Revision: 00000000 Serial number: 5DS 008 795-02
Coding: 3670016
Shop #: WSC 02311 785 00200
VCID: 221DEA9598CC0FCB915-8076

1 Fault Found
01332 - Door Control Module; Passenger Side (J387)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 6
Fault Frequency: 14
Reset counter: 180
Mileage: 0 km
Time Indication: 0
Date: 2002.01.01
Time: 00:00:00


-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: None
Part No SW: 4E0 910 043 HW: 4E0 820 043 A
Component: KLIMAAUTOMAT 011 0190
Revision: 00000009 Serial number: 00000000007827
Coding: 0020545
Shop #: WSC 02311 785 00200
VCID: 5AED9275F01C870B895-800E

6 Faults Found
01087 - Basic Setting Not Performed
005 - No or Incorrect Basic Setting / Adaptation
Freeze Frame:
Fault Status: 01100101
Fault Priority: 2
Fault Frequency: 1
Reset counter: 233
Mileage: 209219 km
Time Indication: 0
Date: 2018.07.25
Time: 17:48:08

00716 - Air recirculation Flap Positioning Motor (V113)
003 - Mechanical Failure
Freeze Frame:
Fault Status: 01100011
Fault Priority: 3
Fault Frequency: 254
Reset counter: 180
Mileage: 230634 km
Time Indication: 0
Date: 2020.05.18
Time: 09:29:51

Freeze Frame:
Voltage: 13.30 V
Temperature: 24.0°C
(no units): 98.0
(no units): 68.0
Temperature: -83.0°C

01592 - Air Quality Sensor (G238)
014 - Defective
Freeze Frame:
Fault Status: 01101110
Fault Priority: 3
Fault Frequency: 2
Reset counter: 180
Mileage: 209219 km
Time Indication: 0
Date: 2018.07.25
Time: 17:50:20

Freeze Frame:
Temperature: 31.0°C

00819 - High Pressure Sensor (G65)
002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 3
Fault Frequency: 9
Reset counter: 215
Mileage: 237541 km
Time Indication: 0
Date: 2022.01.11
Time: 17:10:43

00728 - Potentiometer in Positioning Motor for Left-Hand Central Vent (G136)
010 - Open or Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00101010
Fault Priority: 3
Fault Frequency: 18
Reset counter: 216
Mileage: 236369 km
Time Indication: 0
Date: 2021.11.26
Time: 07:17:45

Freeze Frame:
Voltage: 12.70 V
(no units): 0.0
(no units): 0.0

00604 - Potentiometer Positioning Motor for Air Flow Flap (G113)
010 - Open or Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00101010
Fault Priority: 3
Fault Frequency: 3
Reset counter: 184
Mileage: 236712 km
Time Indication: 0
Date: 2021.12.04
Time: 11:29:24

Freeze Frame:
Voltage: 13.50 V
(no units): 136.0
(no units): 253.0


-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels:. 4E0-910-468.clb
Part No SW: 4E0 910 468 HW: 4E0 907 468 A
Component: Gateway H06 0040
Revision: 06 Serial number: 0000302B2915AF
Coding: FCFE7BDC2B3504
Shop #: WSC 00000 000 00289
VCID: 6597B189C96238F3347-8030

1 Fault Found
01044 - Control Module Incorrectly Coded
000 - -
Freeze Frame:
Fault Status: 01100000
Fault Priority: 1
Fault Frequency: 254
Reset counter: 180
Mileage: 231513 km
Time Indication: 0
Date: 2021.03.02
Time: 12:12:28


-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 4E0-910-131.lbl
Part No SW: 4E0 910 131 HW: 4E0 909 131
Component: FBS AUDID3 H01 0070
Revision: 00703201 Serial number: AUX3Z0BD106427
Coding: 0264192
Shop #: WSC 02311 785 00200
VCID: 58E9887D8E10951BBF1-800C

Subsystem 1 - Part No: XXXXXXXXXXX
Component: ELV XXXX
XXXXXXXXXXX ELV XXXX

1 Fault Found
00172 - Key 2 not learned
008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 5
Fault Frequency: 0
Reset counter: 182
Mileage: 237776 km
Time Indication: 0
Date: 2022.01.27
Time: 16:18:40


-------------------------------------------------------------------------------
Address 34: Level Control Labels: None
Part No SW: 4E0 910 553 C HW: 4E0 907 553 C
Component: LUFTFDR.-CDC H03 4190
Coding: 0015500
Shop #: WSC 02313 785 00200
VCID: 2313EF9187D606C39A3-8076

2 Faults Found
01598 - Drive Battery Voltage
002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 4
Fault Frequency: 141
Reset counter: 216
Mileage: 238115 km
Time Indication: 0
Date: 2022.02.07
Time: 07:52:17

01772 - Signal from Level Control Pressure Sensor (G291)
008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 3
Fault Frequency: 1
Reset counter: 255
Mileage: 237917 km
Time Indication: 0
Date: 2022.02.01
Time: 07:22:54


-------------------------------------------------------------------------------
Address 38: Roof Electronics Labels: 4E0-910-135.lbl
Part No SW: 4E0 910 135 A HW: 4E0 907 135 A
Component: Dachknoten D3 H01 0060
Serial number: 00000232200124
Coding: 0035856
Shop #: WSC 02312 785 00200
VCID: 1D67D969A1B23033AC7-8048

1 Fault Found
01370 - Alarm triggered by Interior Monitoring
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 15
Reset counter: 218
Mileage: 0 km
Time Indication: 0
Date: 2021.03.22
Time: 15:51:00

Freeze Frame:
Bin. Bits: 00000001


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver Labels: 4E1-910-802-42.lbl
Part No SW: 4E1 910 802 HW: 4E2 959 801
Component: Türsteuer.FS BRM004 0060
Coding: 0026914
Shop #: WSC 02311 785 00200
VCID: 5EE59E65EC346B2BF5D-800A

1 Fault Found
02111 - Motor for Window Regulator
005 - No or Incorrect Basic Setting / Adaptation - Intermittent
Freeze Frame:
Fault Status: 00100101
Fault Priority: 3
Fault Frequency: 2
Reset counter: 182
Mileage: 237760 km
Time Indication: 0
Date: 2022.01.27
Time: 07:24:18


-------------------------------------------------------------------------------
Address 46: Central Conv. Labels:. 4E0-910-289.lbl
Part No SW: 4E0 910 289 HW: 4E0 907 289
Component: Komfortgeraet H02 0050
Coding: 0000729
Shop #: WSC 02311 785 00200
VCID: 6695B685346433EB3DD-8032

Subsystem 1 - Part No: 4E0 907 719
Component: Neigungssensor H01 0020

3 Faults Found
01134 - Alarm Horn (H12)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 3
Fault Frequency: 254
Reset counter: 180
Mileage: 115528 km
Time Indication: 0
Date: 2012.11.18
Time: 13:47:17

Freeze Frame:
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000

00985 - Right Tail Light (M2)
014 - Defective - Intermittent
Freeze Frame:
Fault Status: 00101110
Fault Priority: 3
Fault Frequency: 26
Reset counter: 186
Mileage: 237512 km
Time Indication: 0
Date: 2022.01.11
Time: 08:20:16

Freeze Frame:
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000

00985 - Right Tail Light (M2)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00101110
Fault Priority: 3
Fault Frequency: 26
Reset counter: 186
Mileage: 237512 km
Time Indication: 0
Date: 2022.01.11
Time: 08:20:16

Freeze Frame:
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000
Raw, Form. N/A: 000 000 000


-------------------------------------------------------------------------------
Address 47: Sound System Labels: 4E0-910-223.lbl
Part No SW: 4E0 910 223 P HW: 4E0 035 223 A
Component: DSP-Amp.-High H12 0460
Revision: PROD_01O Serial number: 00000000055584
Coding: 0000017
Shop #: WSC 02313 785 00200
VCID: 2A0D02B5E0FCD78BD95-807E

1 Fault Found
02084 - Component Protection
005 - No or Incorrect Basic Setting / Adaptation
Freeze Frame:
Fault Status: 01100101
Fault Priority: 6
Fault Frequency: 1
Reset counter: 162
Mileage: 161852 km
Time Indication: 0
Date: 2015.02.21
Time: 15:17:38


-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. Labels: 4E1-910-802-52.lbl
Part No SW: 4E1 910 802 HW: 4E2 959 802
Component: Türsteuer.BF BRM004 0060
Coding: 0026914
Shop #: WSC 02311 785 00200
VCID: 5EE59E65EC346B2BF5D-800A

1 Fault Found
02111 - Motor for Window Regulator
005 - No or Incorrect Basic Setting / Adaptation - Intermittent
Freeze Frame:
Fault Status: 00100101
Fault Priority: 3
Fault Frequency: 5
Reset counter: 182
Mileage: 237760 km
Time Indication: 0
Date: 2022.01.27
Time: 07:25:24


-------------------------------------------------------------------------------
Address 57: TV Tuner Labels: None
Part No SW: 4E0 910 148 D HW: 4E0 919 148
Component: R78 TVHybridDVB 0440
Revision: R0H06000 Serial number: 76300801556502
Coding: 0000001
Shop #: WSC 02313 785 00200
VCID: 2411EC8D82D801FBE39-8070

1 Fault Found
02283 - Video Connection to Output [End Unit]
010 - Open or Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00101010
Fault Priority: 5
Fault Frequency: 1
Reset counter: 205
Mileage: 238276 km
Time Indication: 0
Date: 2022.02.11
Time: 07:32:24


-------------------------------------------------------------------------------
Address 61: Battery Regul. Labels: 4E0-910-181.lbl
Part No SW: 4E0 910 181 C HW: 4E0 915 181 C
Component: ENERGIEMANAGER H12 0480
Revision: 00000000 Serial number: 00000000011440
Shop #: WSC 00000 000 00000
VCID: 2019E09D96C01DDB871-8074

Subsystem 1 - Part No: 000 915 105 AK
Component: von VA0 1211280464
Coding: 303030393135313035414B56413031323131323830343634
Shop #: WSC 00185 210 88124

5 Faults Found
02255 - Voltage Measuring Lead from Vbat
009 - Open or Short to Ground - Intermittent
Freeze Frame:
Fault Status: 00101001
Fault Priority: 4
Fault Frequency: 2
Reset counter: 183
Mileage: 237801 km
Time Indication: 0
Date: 2022.01.27
Time: 18:35:34

02273 - Quiescent Current Stage 2
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 7
Fault Frequency: 103
Reset counter: 255
Mileage: 231529 km
Time Indication: 0
Date: 2002.09.14
Time: 13:55:42

02276 - Quiescent Current Stage 5
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 7
Fault Frequency: 103
Reset counter: 255
Mileage: 231529 km
Time Indication: 0
Date: 2002.09.14
Time: 16:15:56

02274 - Quiescent Current Stage 3
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 7
Fault Frequency: 103
Reset counter: 255
Mileage: 231529 km
Time Indication: 0
Date: 2002.09.14
Time: 16:16:06

02277 - Quiescent Current Stage 6
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 7
Fault Frequency: 103
Reset counter: 255
Mileage: 231529 km
Time Indication: 0
Date: 2002.09.14
Time: 16:16:16


-------------------------------------------------------------------------------
Address 72: Door, Rear Right Labels: 4E0-910-802.lbl
Part No SW: 4E0 910 802 HW: 4E0 959 802 A
Component: Türsteuer.HR BRM004 0060
Coding: 0026914
Shop #: WSC 02311 785 00200
VCID: 5DE79969E1327033EC7-8008

1 Fault Found
02111 - Motor for Window Regulator
005 - No or Incorrect Basic Setting / Adaptation - Intermittent
Freeze Frame:
Fault Status: 00100101
Fault Priority: 3
Fault Frequency: 1
Reset counter: 183
Mileage: 237776 km
Time Indication: 0
Date: 2022.01.27
Time: 08:06:26


-------------------------------------------------------------------------------
Address 76: Park Assist Labels: 4E0-910-283.lbl
Part No SW: 4E0 910 283 C HW: 4E0 919 283 C
Component: Parkhilfe 8-Kan H12 0030
Revision: 00H12000 Serial number: 08720528501085
Coding: 0201108
Shop #: WSC 02313 785 00200
VCID: 2313EF9187D606C39A3-8076

2 Faults Found
01627 - Sensor for Parking-Aid; Front Mid-Right (G253)
009 - Open or Short to Ground - Intermittent
Freeze Frame:
Fault Status: 00101001
Fault Priority: 3
Fault Frequency: 46
Reset counter: 216
Mileage: 235184 km
Time Indication: 0
Date: 2021.10.18
Time: 07:08:39

01627 - Sensor for Parking-Aid; Front Mid-Right (G253)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 3
Fault Frequency: 67
Reset counter: 203
Mileage: 235528 km
Time Indication: 0
Date: 2021.10.26
Time: 17:16:38


-------------------------------------------------------------------------------

End----------(Elapsed Time: 01:58, VBatt start/end: 12.1V/12.0V)-----------

Some of those (I haven't been through in detail) look old based on date/mileage.
What reappears if you clear all the codes check immediately, use the car for a short while and check again?

HPsauce beat me to it, but it's perhaps something I should have suggested in my previous post. Follow what he said and post your results, and then we can go from there.

Not knowing which codes are relevant to your issue now just gives us more red herrings to eliminate.

There always are codes from flat/disconnected batteries but you also have some that are showing incorrectly coded/no basic settings/component protection.

As said by the previous two posts, clear them all and see which ones are current