I've owned my Leon for nearly a year and it's great. While I've addressed most minor issues I get this occasional vehicle lighting fault pop up on the dash. Sometimes when I check all my lights when the fault is present they are working fine. On other occasions the daytime LEDs are off, as are the sidelights. Headlights work fine though which is odd, it is completely random.
I've done a recent scan using obdeleven, is there anything that looks odd that could help me narrow down what is causing the fault?
OBDeleven data log
Date: 2026-04-13 19:32
Car: Seat Leon FR
Year: 2017
Body type: Hatchback
Engine: CZEA
Mileage: 177829 KM
---------------------------------------------------------------
01 Engine
System description: R4 1.4l TFS
Software number: 04E906027HF
Software version: 3545
Hardware number: 04E907309BJ
Hardware version: H24
ODX name: EV_ECM14TFS01104E906027HF
ODX version: 001006
Long coding: 01190032232419082000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
03 Brakes
System description: ESC
Software number: 5Q0614517CG
Software version: 0643
Hardware number: 5Q0614517AG
Hardware version: H62
Serial number: 51207000001375
ODX name: EV_Brake1UDSContiMK100IPB
ODX version: 036010
Long coding: 20EE8A922428216D0780060040C72404512484E0600224731020F078C002430000000012121212B835351919323200
Trouble codes:
No trouble codes found
---------------------------------------------------------------
08 Air Conditioning
System description: Climatronic
Software number: 5F0907044AK
Software version: 1801
Hardware number: 5F0907044AK
Hardware version: H05
ODX name: EV_ACClimaBHBVW37X
ODX version: 006145
Long coding: 00100004200110011005000000101020
Trouble codes:
No trouble codes found
---------------------------------------------------------------
09 Central Electrics
System description: BCM MQBAB H
Software number: 5Q0937084CG
Software version: 0236
Hardware number: 5Q0937084CG
Hardware version: H34
Serial number: 02001711901220
ODX name: EV_BCMMQB
ODX version: 017001
Long coding: 000000000000000000000000000000000000000000000000000000000000
Subsystems:
System description: WWS370 170326
Software version: 0574
Hardware version: 041
Serial number: 170420095254
Long coding: 0BC5FD
System description: RLHS
Software version: 0206
Hardware version: 054
Serial number: S4Y20M05D08H09M25S54
Long coding: 2E28BB
System description: Sensor, DWA
Software version: 0316
Hardware version: 005
Serial number: 000000000ZY170521JMA
System description: Sirene, DWA
Software version: 0314
Hardware version: 005
Serial number: 00000000000068197399
Trouble codes:
U112100 - Data bus missing message
Intermittent
Date: 2026-04-13 07:23:23
Mileage: 177808 km
Priority: 6
Malfunction frequency counter: 2
Unlearning counter: 89
Time Indication: 00
Terminal 15 status: On
Terminal 50 status: Off
Voltage: 11.8 V
Outside air temperature: 7.0 °C
Status Bremslichtschalter (HW): Off
Status Bremslichtschalter (CAN): Off
Off: operated
Parking light: not activated
Automatic high beam assist: not activated
Low beam: not activated
Parking light left: not activated
Parking light right: not activated
Letzte Weckursache/ Werte [00;2E]: gültiges Funktelegramm
CAN-Bus_aktiv: On
---------------------------------------------------------------
13 Adaptive Cruise Control
System description: ACC BOSCH MQB
Software number: 5Q0907572H
Software version: 0620
Hardware number: 5Q0907572H
Hardware version: H10
ODX name: EV_ACCBOSCHVW416
ODX version: 002005
Long coding: 2D00008151FF8428949C814500300400000000000000000000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
15 Airbag
System description: Airbag VW20
Software number: 3Q0959655AS
Software version: 0200
Hardware number: 3Q0959655AS
Hardware version: 013
Serial number: 003SQP8TGK7X
ODX name: EV_AirbaVW20TS6VW48X
ODX version: 001116
Long coding: 98CCC000000000005C0000CC008800000065
Subsystems:
System description: SideSensor_Df
Software version: 0887
Hardware version: 008
Serial number: 3576U00000055DE0812D
Long coding: 2D2D2D
System description: SideSensor_Pf
Software version: 0887
Hardware version: 008
Serial number: 3586U000000355C08122
Long coding: 2D2D2D
System description: SideSensor_Dr
Software version: 0148
Hardware version: 301
Serial number: 3516R45B1AF0F000000H
Long coding: 2D2D2D
System description: SideSensor_Pr
Software version: 0148
---------------------------------------------------------------
16 Steering Column
System description: Lenks. Modul
Software number: 5Q0953507GD
Software version: 0140
Hardware number: 5Q0953549F
Hardware version: 003
Serial number: 11051704400159
ODX name: EV_SMLSKLOMQB
ODX version: 020002
Long coding: 1400
Trouble codes:
No trouble codes found
---------------------------------------------------------------
17 Dashboard
System description: KOMBI
Software number: 5F0920950D
Software version: 8311
Hardware number: 5F0920950D
Hardware version: 306
ODX name: EV_DashBoardVDDMQBAB
ODX version: 009051
Long coding: 27A42A002B80260001886A011000000000000000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
19 Gateway
System description: GW MQB High
Software number: 3Q0907530C
Software version: 4286
Hardware number: 3Q0907530C
Hardware version: 418
Serial number: 0006274947
ODX name: EV_GatewNF
ODX version: 013020
Long coding: 030100F42F085700EB000248080F00010001050000000000000000000000
Subsystems:
System description: J367-BDMConti
Software version: 1050
Hardware version: H03
Serial number: 75886000001705041C20
System description: E221__MFL-PR6
Software version: 0130
Hardware version: H04
Serial number: 000000000H1462040517
Long coding: 002000
Trouble codes:
U132600 - Multi-function module no communication
Intermittent
Date: 2026-04-13 07:20:40
Mileage: 177808 km
Priority: 2
Malfunction frequency counter: 2
Unlearning counter: 89
Time Indication: 00
Supply voltage, terminal 30: 11.8 V
Terminal 15: Off
---------------------------------------------------------------
42 Driver Door
System description: TSG FS
Software number: 5Q4959593E
Software version: 0032
Hardware number: 5Q4959593B
Hardware version: 010
Serial number: 0000254544027
ODX name: EV_DCUDriveSideEWMAXCONT
ODX version: 006001
Long coding: 00100220DC01040000001000
Subsystems:
System description: FOND_FHSG_DRV
Software version: 0005
Hardware version: 005
Serial number: 00000000000014615527
Long coding: 2D0000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
44 Steering Assistance
System description: EPS_MQB_ZFLS
Software number: 5Q0909144T
Software version: 1072
Hardware number: 5Q0909144R
Hardware version: 129
ODX name: EV_SteerAssisMQB
ODX version: 013144
Long coding: 8107
Trouble codes:
No trouble codes found
---------------------------------------------------------------
4B Multifunction Module
System description: FCM MQB Low
Software number: 3Q0907338
Software version: 0286
Hardware number: 3Q0907338
Hardware version: 002
Serial number: 29061811600926
ODX name: EV_MultiModulContiVW48X
ODX version: 001010
Long coding: 000000070100094400000900000000000000000000000000000000000000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
52 Passenger Door
System description: TSG BFS
Software number: 5Q4959592E
Software version: 0032
Hardware number: 5Q4959592B
Hardware version: 010
Serial number: 0000253380342
ODX name: EV_DCUPasseSideEWMAXCONT
ODX version: 006001
Long coding: 00100220DE01040000001000
Subsystems:
System description: FOND_FHSG_PSG
Software version: 0005
Hardware version: 005
Serial number: 00000000000014750217
Long coding: 350000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
5F Multimedia
System description: MU-S-ND-ER
Software number: 5QA035858A
Software version: 0369
Hardware number: 5QA035858A
Hardware version: H31
Serial number: SEZAZ2T1104718
ODX name: EV_MUStd6C1TSAT
ODX version: 001015
Long coding: 04738001D70A000011111101008808002F0101C601200100C6
Subsystems:
System description: ABTm-2_8-CR
Software version: 1041
Hardware version: H41
Serial number: SEZ8Z9TJH01TSJ
Trouble codes:
No trouble codes found
---------------------------------------------------------------
76 Parking Assistance
System description: PDC 4 Kanal
Software number: 5QA919283A
Software version: 0038
Hardware number: 5QA919283
Hardware version: H07
Serial number: 00030841961711803404
ODX name: EV_EPHVA14AU3700000
ODX version: 009029
Long coding: 0600040001
Trouble codes:
No trouble codes found
---------------------------------------------------------------
D6 LED Module Left
System description: LED1L
Software number: 7P5941591AD
Software version: 0005
Hardware number: 7P5941591A
Hardware version: H06
ODX name: EV_LED_PLUS_L_KEBODAVW416
ODX version: 001003
Trouble codes:
U120100 - Data bus no communication
Intermittent
Priority: 6
Malfunction frequency counter: 16
Unlearning counter: 0
Time Indication: 00
---------------------------------------------------------------
D7 LED Module Right
System description: LED1R
Software number: 7P5941591AD
Software version: 0005
Hardware number: 7P5941591A
Hardware version: H06
ODX name: EV_LED_PLUS_R_KEBODAVW416
ODX version: 001003
Trouble codes:
U120100 - Data bus no communication
Intermittent
Priority: 6
Malfunction frequency counter: 16
Unlearning counter: 0
Time Indication: 00
I've done a recent scan using obdeleven, is there anything that looks odd that could help me narrow down what is causing the fault?
OBDeleven data log
Date: 2026-04-13 19:32
Car: Seat Leon FR
Year: 2017
Body type: Hatchback
Engine: CZEA
Mileage: 177829 KM
---------------------------------------------------------------
01 Engine
System description: R4 1.4l TFS
Software number: 04E906027HF
Software version: 3545
Hardware number: 04E907309BJ
Hardware version: H24
ODX name: EV_ECM14TFS01104E906027HF
ODX version: 001006
Long coding: 01190032232419082000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
03 Brakes
System description: ESC
Software number: 5Q0614517CG
Software version: 0643
Hardware number: 5Q0614517AG
Hardware version: H62
Serial number: 51207000001375
ODX name: EV_Brake1UDSContiMK100IPB
ODX version: 036010
Long coding: 20EE8A922428216D0780060040C72404512484E0600224731020F078C002430000000012121212B835351919323200
Trouble codes:
No trouble codes found
---------------------------------------------------------------
08 Air Conditioning
System description: Climatronic
Software number: 5F0907044AK
Software version: 1801
Hardware number: 5F0907044AK
Hardware version: H05
ODX name: EV_ACClimaBHBVW37X
ODX version: 006145
Long coding: 00100004200110011005000000101020
Trouble codes:
No trouble codes found
---------------------------------------------------------------
09 Central Electrics
System description: BCM MQBAB H
Software number: 5Q0937084CG
Software version: 0236
Hardware number: 5Q0937084CG
Hardware version: H34
Serial number: 02001711901220
ODX name: EV_BCMMQB
ODX version: 017001
Long coding: 000000000000000000000000000000000000000000000000000000000000
Subsystems:
System description: WWS370 170326
Software version: 0574
Hardware version: 041
Serial number: 170420095254
Long coding: 0BC5FD
System description: RLHS
Software version: 0206
Hardware version: 054
Serial number: S4Y20M05D08H09M25S54
Long coding: 2E28BB
System description: Sensor, DWA
Software version: 0316
Hardware version: 005
Serial number: 000000000ZY170521JMA
System description: Sirene, DWA
Software version: 0314
Hardware version: 005
Serial number: 00000000000068197399
Trouble codes:
U112100 - Data bus missing message
Intermittent
Date: 2026-04-13 07:23:23
Mileage: 177808 km
Priority: 6
Malfunction frequency counter: 2
Unlearning counter: 89
Time Indication: 00
Terminal 15 status: On
Terminal 50 status: Off
Voltage: 11.8 V
Outside air temperature: 7.0 °C
Status Bremslichtschalter (HW): Off
Status Bremslichtschalter (CAN): Off
Off: operated
Parking light: not activated
Automatic high beam assist: not activated
Low beam: not activated
Parking light left: not activated
Parking light right: not activated
Letzte Weckursache/ Werte [00;2E]: gültiges Funktelegramm
CAN-Bus_aktiv: On
---------------------------------------------------------------
13 Adaptive Cruise Control
System description: ACC BOSCH MQB
Software number: 5Q0907572H
Software version: 0620
Hardware number: 5Q0907572H
Hardware version: H10
ODX name: EV_ACCBOSCHVW416
ODX version: 002005
Long coding: 2D00008151FF8428949C814500300400000000000000000000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
15 Airbag
System description: Airbag VW20
Software number: 3Q0959655AS
Software version: 0200
Hardware number: 3Q0959655AS
Hardware version: 013
Serial number: 003SQP8TGK7X
ODX name: EV_AirbaVW20TS6VW48X
ODX version: 001116
Long coding: 98CCC000000000005C0000CC008800000065
Subsystems:
System description: SideSensor_Df
Software version: 0887
Hardware version: 008
Serial number: 3576U00000055DE0812D
Long coding: 2D2D2D
System description: SideSensor_Pf
Software version: 0887
Hardware version: 008
Serial number: 3586U000000355C08122
Long coding: 2D2D2D
System description: SideSensor_Dr
Software version: 0148
Hardware version: 301
Serial number: 3516R45B1AF0F000000H
Long coding: 2D2D2D
System description: SideSensor_Pr
Software version: 0148
---------------------------------------------------------------
16 Steering Column
System description: Lenks. Modul
Software number: 5Q0953507GD
Software version: 0140
Hardware number: 5Q0953549F
Hardware version: 003
Serial number: 11051704400159
ODX name: EV_SMLSKLOMQB
ODX version: 020002
Long coding: 1400
Trouble codes:
No trouble codes found
---------------------------------------------------------------
17 Dashboard
System description: KOMBI
Software number: 5F0920950D
Software version: 8311
Hardware number: 5F0920950D
Hardware version: 306
ODX name: EV_DashBoardVDDMQBAB
ODX version: 009051
Long coding: 27A42A002B80260001886A011000000000000000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
19 Gateway
System description: GW MQB High
Software number: 3Q0907530C
Software version: 4286
Hardware number: 3Q0907530C
Hardware version: 418
Serial number: 0006274947
ODX name: EV_GatewNF
ODX version: 013020
Long coding: 030100F42F085700EB000248080F00010001050000000000000000000000
Subsystems:
System description: J367-BDMConti
Software version: 1050
Hardware version: H03
Serial number: 75886000001705041C20
System description: E221__MFL-PR6
Software version: 0130
Hardware version: H04
Serial number: 000000000H1462040517
Long coding: 002000
Trouble codes:
U132600 - Multi-function module no communication
Intermittent
Date: 2026-04-13 07:20:40
Mileage: 177808 km
Priority: 2
Malfunction frequency counter: 2
Unlearning counter: 89
Time Indication: 00
Supply voltage, terminal 30: 11.8 V
Terminal 15: Off
---------------------------------------------------------------
42 Driver Door
System description: TSG FS
Software number: 5Q4959593E
Software version: 0032
Hardware number: 5Q4959593B
Hardware version: 010
Serial number: 0000254544027
ODX name: EV_DCUDriveSideEWMAXCONT
ODX version: 006001
Long coding: 00100220DC01040000001000
Subsystems:
System description: FOND_FHSG_DRV
Software version: 0005
Hardware version: 005
Serial number: 00000000000014615527
Long coding: 2D0000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
44 Steering Assistance
System description: EPS_MQB_ZFLS
Software number: 5Q0909144T
Software version: 1072
Hardware number: 5Q0909144R
Hardware version: 129
ODX name: EV_SteerAssisMQB
ODX version: 013144
Long coding: 8107
Trouble codes:
No trouble codes found
---------------------------------------------------------------
4B Multifunction Module
System description: FCM MQB Low
Software number: 3Q0907338
Software version: 0286
Hardware number: 3Q0907338
Hardware version: 002
Serial number: 29061811600926
ODX name: EV_MultiModulContiVW48X
ODX version: 001010
Long coding: 000000070100094400000900000000000000000000000000000000000000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
52 Passenger Door
System description: TSG BFS
Software number: 5Q4959592E
Software version: 0032
Hardware number: 5Q4959592B
Hardware version: 010
Serial number: 0000253380342
ODX name: EV_DCUPasseSideEWMAXCONT
ODX version: 006001
Long coding: 00100220DE01040000001000
Subsystems:
System description: FOND_FHSG_PSG
Software version: 0005
Hardware version: 005
Serial number: 00000000000014750217
Long coding: 350000
Trouble codes:
No trouble codes found
---------------------------------------------------------------
5F Multimedia
System description: MU-S-ND-ER
Software number: 5QA035858A
Software version: 0369
Hardware number: 5QA035858A
Hardware version: H31
Serial number: SEZAZ2T1104718
ODX name: EV_MUStd6C1TSAT
ODX version: 001015
Long coding: 04738001D70A000011111101008808002F0101C601200100C6
Subsystems:
System description: ABTm-2_8-CR
Software version: 1041
Hardware version: H41
Serial number: SEZ8Z9TJH01TSJ
Trouble codes:
No trouble codes found
---------------------------------------------------------------
76 Parking Assistance
System description: PDC 4 Kanal
Software number: 5QA919283A
Software version: 0038
Hardware number: 5QA919283
Hardware version: H07
Serial number: 00030841961711803404
ODX name: EV_EPHVA14AU3700000
ODX version: 009029
Long coding: 0600040001
Trouble codes:
No trouble codes found
---------------------------------------------------------------
D6 LED Module Left
System description: LED1L
Software number: 7P5941591AD
Software version: 0005
Hardware number: 7P5941591A
Hardware version: H06
ODX name: EV_LED_PLUS_L_KEBODAVW416
ODX version: 001003
Trouble codes:
U120100 - Data bus no communication
Intermittent
Priority: 6
Malfunction frequency counter: 16
Unlearning counter: 0
Time Indication: 00
---------------------------------------------------------------
D7 LED Module Right
System description: LED1R
Software number: 7P5941591AD
Software version: 0005
Hardware number: 7P5941591A
Hardware version: H06
ODX name: EV_LED_PLUS_R_KEBODAVW416
ODX version: 001003
Trouble codes:
U120100 - Data bus no communication
Intermittent
Priority: 6
Malfunction frequency counter: 16
Unlearning counter: 0
Time Indication: 00
