Need Help (Dash lighting up like 4th of July)

[HazeMyth]

I get in my car today and start it. I get a quick prompt regarding replacing the battery in my key, then that goes away. I immediately get a TPMS malfunction error, parking brake malfunction, and more. I pulled the logs in VCDS and sent them over to my service adviser. He had a technician in it, and the tech claimed that I just need to replace the batteries in my key fobs. Strange... they both tested a 2.92=2.97v, which is perfectly fine. I replaced those batteries anyway since they're cheap. Still have an issue, and trying to erase the codes in VCDS immediately results in the codes coming back.

I replaced the car battery and coded it in VCDS in hopes that this would solve the issue. With a 5 year old battery that wasn't looking so good when I checked it in VCDS, it seemed like a sure-fire fix. Nooope, same problem.

Anyone got any ideas on this at all? I removed parts of the log that have no faults listed since the text amount is limited.

Chassis Type: FR-AU48 (8R0)
Scan: 01 02 03 05 06 08 09 15 16 17 19 22 36 42 44 46 47 52 53 56
5F 6C A9

VIN: Redacted Mileage: 67000km-41631miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: Malfunction 0010
06-Seat Mem. Pass -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: Malfunction 0010
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
A9-Struct. Borne Sound -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CGXC) Labels:. 06E-907-551-CGW.clb
Part No SW: 8K5 907 551 E HW: 4G0 907 551 A
Component: 3.0l V6 TFSIH07 0004
Revision: --H07---
Coding: 1A250034052600060000
Shop #: WSC 06208 000 00000
ASAM Dataset: EV_ECM30TFS0218K5907551E 001004
ROD: EV_ECM30TFS0218K5907551E.rod
VCID: 382A20B342D3A9D7A3A-806C

1 Fault Found:
6492 - Sensor for Ambient Air Temperature (G17)
P0073 00 [045] - Signal too High
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 3
Mileage: 66981 km
Date: 2017.08.10
Time: 14:05:05

Engine speed: 1521.00 /min
Normed load value: 18.8 %
Vehicle speed: 0 km/h
Coolant temperature: 36 °C
Intake air temperature: 36 °C
Ambient air pressure: 790 mbar
Voltage terminal 30: 10.765 V
Unlearning counter according OBD: 40
Engine speed: actual: 0 /min
MAF_ENVD: 0.00000 mg/stroke
Coolant temperature (unfiltered): 93.75 °C
Engine: operating status: ES
Engine load: 0.000000 %
Vehicle speed: actual: 0 km/h

Readiness: 0000 0100

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels:. 8K0-907-379-V1.clb
Part No SW: 8K0 907 379 CK HW: 8K0 907 379 CK
Component: ESP8 quattro H09 0100
Revision: -------- Serial number: --------------
Coding: 291D1A
Shop #: WSC 06325 000 00000
VCID: 045284434E1B3D377F2-8050

1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
013 - Check DTC Memory
Freeze Frame:
Fault Status: 01101101
Fault Priority: 6
Fault Frequency: 2
Reset counter: 98
Mileage: 66981 km
Time Indication: 0
Date: 2017.08.10
Time: 14:05:06

Freeze Frame:
Hex Value: 0x00C0
Hex Value: 0x40A2
Hex Value: 0x0022
Hex Value: 0x338D
Hex Value: 0x0000


-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393) Labels:. 8K0-907-064-05.clb
Part No SW: 8K0 907 064 GM HW: 8K0 907 064 FM
Component: BCM2 2.0 H11 0621
Revision: 00002001
Coding: 0D804000000000000000
Shop #: WSC 06325 000 00000
VCID: 015C8D575109281F544-8054

Subsystem 1 - Part No SW: 8K0 905 852 E HW: 8K0 905 852 E
Component: J764 ELV MLB H40 0046
Serial number: 2312000178985012

2 Faults Found:
00956 - Key 2
002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 3
Fault Frequency: 1
Reset counter: 138
Mileage: 66652 km
Time Indication: 0
Date: 2017.07.24
Time: 06:41:59

01330 - Central Control Module for Central Convenience (J393)
013 - Check DTC Memory
Freeze Frame:
Fault Status: 01101101
Fault Priority: 6
Fault Frequency: 4
Reset counter: 98
Mileage: 66981 km
Time Indication: 0
Date: 2017.08.10
Time: 14:05:22


-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255) Labels: Redir Fail!
Part No SW: 8K1 820 043 T HW: 8K1 820 043 T
Component: KLIMA 3 ZONEN H04 0121
Revision: C1000000 Serial number: 01090820122062
Coding: 6602228000
Shop #: WSC 06325 000 00000
VCID: 392C25B77959B0DF5C4-806C

2 Faults Found:
00457 - Control Module for Network (J519)
013 - Check DTC Memory
Freeze Frame:
Fault Status: 01101101
Fault Priority: 6
Fault Frequency: 2
Reset counter: 98
Mileage: 66981 km
Time Indication: 0
Date: 2017.08.10
Time: 14:05:04

01317 - Control Module in Instrument Cluster (J285)
008 - Implausible Signal
Freeze Frame:
Fault Status: 01101000
Fault Priority: 6
Fault Frequency: 3
Reset counter: 98
Mileage: 66981 km
Time Indication: 0
Date: 2017.08.10
Time: 14:05:17


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 8K0-907-063.clb
Part No SW: 8K0 907 063 DH HW: 8K0 907 063 DH
Component: BCM1 1.0 H16 0103
Revision: 08016001 Serial number: 00000462928301
Coding: 26008011813CAFE0210040C300003D0D4F9CD388A209022100 0008004000030100000030000000
Shop #: WSC 09532 003 104857
VCID: 78AAE0B302D369D763A-802C

Subsystem 1 - Part No SW: 8T1 955 119 D HW: 8J1 955 119 Labels: 1KX-955-119.CLB
Component: WWS 070812 H15 0080
Serial number: SWF12080075028
Coding: 00FD11

Subsystem 2 - Part No SW: 8U0 955 559 B HW: 8U0 955 559 B Labels: 8U0-955-559.CLB
Component: G397_RLFS H06 0002
Serial number: 20496662
Coding: 02005D

Subsystem 3 - Part No SW: 8K0 941 531 AS HW: 8K0 941 531 AS
Component: E1 - LDS H03 0031
Serial number: 00000000000108121378

Subsystem 4 - Part No SW: 4G0 907 410 A HW: 4H0 907 410 A
Component: USHL4.2 H30 0030
Serial number: 0000002274555R2HFB02

Subsystem 5 - Part No SW: 4H0 907 658 HW: 4H0 907 658
Component: AQ_Hum_Sensor H02 0002
Serial number: A1B84E36000000000001

2 Faults Found:
00779 - Outside Air Temp Sensor (G17)
012 - Electrical Fault in Circuit
Freeze Frame:
Fault Status: 01101100
Fault Priority: 2
Fault Frequency: 4
Reset counter: 98
Mileage: 66981 km
Time Indication: 0
Date: 2017.08.10
Time: 14:04:56

01317 - Control Module in Instrument Cluster (J285)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 1
Reset counter: 138
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 14:38:12
-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:. 8T0-920-xxx-17.clb
Part No SW: 8T0 920 983 P HW: 8T0 920 983 P
Component: KOMBIINSTR. H35 0556
Revision: 00100000 Serial number: V2C25772E
Coding: 83BF01008301D705020000
Shop #: WSC 09532 003 104857
VCID: 4BC06F7F23C5324FFE8-801E

1 Fault Found:
00457 - Control Module for Network (J519)
013 - Check DTC Memory
Freeze Frame:
Fault Status: 01101101
Fault Priority: 6
Fault Frequency: 4
Reset counter: 98
Mileage: 66981 km
Time Indication: 0
Date: 2017.08.10
Time: 14:04:58
-------------------------------------------------------------------------------
Address 46: Central Conv. (J393) Labels:. 8K0-907-064-46.clb
Part No SW: 8K0 907 064 GM HW: 8K0 907 064 FM
Component: BCM2 2.0 H11 0621
Revision: 00002001 Serial number: 0181855134
Coding: 0106069A00FA400582B0003200000000
Shop #: WSC 09532 003 104857
VCID: 015C8D575109281F544-8054

Subsystem 1 - Part No SW: 8K0 959 719 B HW: 8K0 959 719
Component: GTO BF H01 0080
Serial number: 00000000000000552261

Subsystem 2 - Part No: 1K0 951 605 C
Component: LIN BACKUP HO H05 1501

Subsystem 3 - Part No SW: 8R0 959 591 A HW: 8R0 959 591
Component: J245EE20SKB13 H03 0220
Serial number: 0123456789ABCDEFGHIJ

1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
013 - Check DTC Memory
Freeze Frame:
Fault Status: 01101101
Fault Priority: 6
Fault Frequency: 4
Reset counter: 98
Mileage: 66981 km
Time Indication: 0
Date: 2017.08.10
Time: 14:05:22
-------------------------------------------------------------------------------
Address 53: Parking Brake (----) Labels: 8K0-907-801-V2.clb
Part No SW: 8K0 907 801 L HW: 8K0 907 801 J
Component: EPB-4 H01 0003
Revision: -------- Serial number: 10000000081754
ASAM Dataset: EV_ParkiBrake 001027
ROD: EV_ParkiBrake_VW51.rod
VCID: 382A20B342D3A9D7A3A-806C

1 Fault Found:
461568 - Function Restriction due to Faults in Other Modules
U1113 00 [137] - -
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 3
Reset counter: 98
Mileage: 66981 km
Date: 2017.08.10
Time: 14:05:16

Voltage terminal 30: 13.2 V
Internal Fault ID: 147
Vehicle speed: 0 km/h
Network management state: normal
Function light in parking brake button: On
Red operating lamp: On
Red warning lamp: OFF
Green operating lamp: OFF
Yellow warning lamp: OFF
Terminal 15 status: On
RWU: not active
DSD: not active
HTR: not active
ECD: not active
ACC requested apply: not active
Auto Adjust: not active
General Inspection Function: not active
Internal Parking Brake state: static
Status of parking brake button: Not operated
Status ParkingBrake left: Set
Status ParkingBrake right: Set
--------------------------------------------------------------------------------


Chassis Type: FR-AU48 (8R0)
Scan: 01 02 03 05 06 08 09 15 16 17 19 22 36 42 44 46 47 52 53 56
5F 6C A9

VIN: Redacted Mileage: 67000km-41631miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: Malfunction 0010
06-Seat Mem. Pass -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: Malfunction 0010
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
A9-Struct. Borne Sound -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CGXC) Labels:. 06E-907-551-CGW.clb
Part No SW: 8K5 907 551 E HW: 4G0 907 551 A
Component: 3.0l V6 TFSIH07 0004
Revision: --H07---
Coding: 1A250034052600060000
Shop #: WSC 06208 000 00000
ASAM Dataset: EV_ECM30TFS0218K5907551E 001004
ROD: EV_ECM30TFS0218K5907551E.rod
VCID: 382A20B342D3A9D7A3A-806C

1 Fault Found:
6492 - Sensor for Ambient Air Temperature (G17)
P0073 00 [168] - Signal too High
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Mileage: 67000 km
Date: 2017.08.10
Time: 19:56:24

Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 57 °C
Intake air temperature: 50 °C
Ambient air pressure: 800 mbar
Voltage terminal 30: 11.984 V
Unlearning counter according OBD: 40
Engine speed: actual: 1248 /min
MAF_ENVD: 98.04706 mg/stroke
Coolant temperature (unfiltered): 90.75 °C
Engine: operating status: IS
Engine load: 3.906250 %
Vehicle speed: actual: 0 km/h

Readiness: 1010 1101
-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels:. 8K0-907-379-V1.clb
Part No SW: 8K0 907 379 CK HW: 8K0 907 379 CK
Component: ESP8 quattro H09 0100
Revision: -------- Serial number: --------------
Coding: 291D1A
Shop #: WSC 06325 000 00000
VCID: 045284434E1B3D377F2-8050

1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 2
Reset counter: 139
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 20:13:22

Freeze Frame:
Hex Value: 0x00C0
Hex Value: 0x40A2
Hex Value: 0x0022
Hex Value: 0x3392
Hex Value: 0x0000


-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393) Labels:. 8K0-907-064-05.clb
Part No SW: 8K0 907 064 GM HW: 8K0 907 064 FM
Component: BCM2 2.0 H11 0621
Revision: 00002001
Coding: 0D804000000000000000
Shop #: WSC 06325 000 00000
VCID: 015C8D575109281F544-8054

Subsystem 1 - Part No SW: 8K0 905 852 E HW: 8K0 905 852 E
Component: J764 ELV MLB H40 0046
Serial number: 2312000178985012

1 Fault Found:
01330 - Central Control Module for Central Convenience (J393)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 3
Reset counter: 139
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 19:55:32
-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255) Labels: Redir Fail!
Part No SW: 8K1 820 043 T HW: 8K1 820 043 T
Component: KLIMA 3 ZONEN H04 0121
Revision: C1000000 Serial number: 01090820122062
Coding: 6602228000
Shop #: WSC 06325 000 00000
VCID: 392C25B77959B0DF5C4-806C

2 Faults Found:
00457 - Control Module for Network (J519)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 2
Reset counter: 139
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 19:55:27

01317 - Control Module in Instrument Cluster (J285)
008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 6
Fault Frequency: 3
Reset counter: 139
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 19:55:27


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 8K0-907-063.clb
Part No SW: 8K0 907 063 DH HW: 8K0 907 063 DH
Component: BCM1 1.0 H16 0103
Revision: 08016001 Serial number: 00000462928301
Coding: 26008011813CAFE0210040C300003D0D4F9CD388A209022100 0008004000030100000030000000
Shop #: WSC 09532 003 104857
VCID: 78AAE0B302D369D763A-802C

Subsystem 1 - Part No SW: 8T1 955 119 D HW: 8J1 955 119 Labels: 1KX-955-119.CLB
Component: WWS 070812 H15 0080
Serial number: SWF12080075028
Coding: 00FD11

Subsystem 2 - Part No SW: 8U0 955 559 B HW: 8U0 955 559 B Labels: 8U0-955-559.CLB
Component: G397_RLFS H06 0002
Serial number: 20496662
Coding: 02005D

Subsystem 3 - Part No SW: 8K0 941 531 AS HW: 8K0 941 531 AS
Component: E1 - LDS H03 0031
Serial number: 00000000000108121378

Subsystem 4 - Part No SW: 4G0 907 410 A HW: 4H0 907 410 A
Component: USHL4.2 H30 0030
Serial number: 0000002274555R2HFB02

Subsystem 5 - Part No SW: 4H0 907 658 HW: 4H0 907 658
Component: AQ_Hum_Sensor H02 0002
Serial number: A1B84E36000000000001

2 Faults Found:
00779 - Outside Air Temp Sensor (G17)
012 - Electrical Fault in Circuit - Intermittent
Freeze Frame:
Fault Status: 00101100
Fault Priority: 2
Fault Frequency: 3
Reset counter: 139
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 19:55:27

01317 - Control Module in Instrument Cluster (J285)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 1
Reset counter: 138
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 20:14:47
-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:. 8T0-920-xxx-17.clb
Part No SW: 8T0 920 983 P HW: 8T0 920 983 P
Component: KOMBIINSTR. H35 0556
Revision: 00100000 Serial number: V2C25772E
Coding: 83BF01008301D705020000
Shop #: WSC 09532 003 104857
VCID: 4BC06F7F23C5324FFE8-801E

1 Fault Found:
00457 - Control Module for Network (J519)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 3
Reset counter: 139
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 19:55:28
-------------------------------------------------------------------------------
Address 46: Central Conv. (J393) Labels:. 8K0-907-064-46.clb
Part No SW: 8K0 907 064 GM HW: 8K0 907 064 FM
Component: BCM2 2.0 H11 0621
Revision: 00002001 Serial number: 0181855134
Coding: 0106069A00FA400582B0003200000000
Shop #: WSC 09532 003 104857
VCID: 015C8D575109281F544-8054

Subsystem 1 - Part No SW: 8K0 959 719 B HW: 8K0 959 719
Component: GTO BF H01 0080
Serial number: 00000000000000552261

Subsystem 2 - Part No: 1K0 951 605 C
Component: LIN BACKUP HO H05 1501

Subsystem 3 - Part No SW: 8R0 959 591 A HW: 8R0 959 591
Component: J245EE20SKB13 H03 0220
Serial number: 0123456789ABCDEFGHIJ

1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 3
Reset counter: 139
Mileage: 67000 km
Time Indication: 0
Date: 2017.08.10
Time: 19:55:32
-------------------------------------------------------------------------------
Address 53: Parking Brake (----) Labels: 8K0-907-801-V2.clb
Part No SW: 8K0 907 801 L HW: 8K0 907 801 J
Component: EPB-4 H01 0003
Revision: -------- Serial number: 10000000081754
ASAM Dataset: EV_ParkiBrake 001027
ROD: EV_ParkiBrake_VW51.rod
VCID: 382A20B342D3A9D7A3A-806C

1 Fault Found:
461568 - Function Restriction due to Faults in Other Modules
U1113 00 [008] - -
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 3
Reset counter: 139
Mileage: 67000 km
Date: 2017.08.10
Time: 19:55:30

Voltage terminal 30: 12.1 V
Internal Fault ID: 147
Vehicle speed: 0 km/h
Network management state: normal
Function light in parking brake button: On
Red operating lamp: On
Red warning lamp: OFF
Green operating lamp: OFF
Yellow warning lamp: OFF
Terminal 15 status: On
RWU: not active
DSD: not active
HTR: not active
ECD: not active
ACC requested apply: not active
Auto Adjust: not active
General Inspection Function: not active
Internal Parking Brake state: static
Status of parking brake button: Not operated
Status ParkingBrake left: Set
Status ParkingBrake right: Set

[HazeMyth]

Replying to myself here, but I'm wondering if my outside air temperature sensor is damaged or missing. Reading up on some of the more serious faults I have, it seems those ambient temperature sensors become damaged or fall off of these cars pretty regularly. I no longer have an outside air temperature reading on my dash, so it's pretty obvious that sensor is at least one of my issues.

Anyone happen to know if that sensor is enough to cause all of these other lights to come on? TPMS, Brake, etc.

[RockJGC]

Strange...Did you check for evidence of rodents getting into any of the wiring harnesses? I know someone who went through something similar and it turned out that he had mice munching on his wires. They apparently like the soy-based wire insulation and decided to make themselves a nice snack.

[Jeff V.]

That's weird as hell. It seems like a lot of the other modules reference a fault in the cluster. If the outside temp sensor connects to the cluster, and it's shorted out, that could explain it.

The sensor is near the hood latch. It attaches to the back of the grille. It's easy to pop the cover panel off so you can get to it. I'd check to see if it's been chewed on, like RockJGC suggested. It's also possible the harness was chafing against the AC condenser, and now it's shorted out. If the harness is ok, maybe try unplugging the sensor and see if there's any change.

[T_Glass_27]

Mine just did the exact same thing today! Beeped and said Parking brake malfunction, then beeped TPMS malfunction, then some other malfunction and like 4 lights on the dash came on.

[drdrewusaf]

Had something similar happen on my '13 S5...closer to what @T_Glass_27 described. It happened right before I arrived at the gym...I cleared the errors in VCDS, wiggled and checked the EPB calipers/connectors, checked the outside temp sensor in the same way. Went into the gym for an hour or so, came out, car started fine, no errors and the temp was being displayed again. Never had the issue again.

I probably lucked out...


Drew

[HazeMyth]

I wasn't aware you could get to the sensor without taking the bumper off. I'm going to go try that out real quick.

I don't have any evidence of rodents or anything like that. No water in the car where control systems are, etc. I'll check out that sensor and report back.

[LINDW4LL]

I'd clear the codes and see if they come back.

[HazeMyth]

I'd clear the codes and see if they come back.

Yeah, they were definitely coming back immediately. I've got it figured out now. It is definitely the ambient air temp sensor. After inspecting it, there's some exposed wire on the end of it. After pushing the insulation back over the wire and restarting the car I had a temperature readout on my dash once again. The codes still persisted even after wiping them, so I was heading down to the dealership. After about 2 miles of driving the TPMS, EPC and Parking errors all went away and I was left with a check engine light only. Instead of going to the dealership I went back home, wiped the DTCs, and went out for a test drive. No more errors, no more faults. I left a voicemail for my service advisor to have him order me a new ambient air temp sensor and schedule an appointment to have it replaced.

I'm keeping the new battery even though it wasn't the issue. The car was still starting fine, but since it didn't test all that well in VCDS I figured I might as well just keep it in there and not have to deal with battery issues any time soon.

Thanks all for the help and input!

[T_Glass_27]

Where is the sensor located? Actually, nvm yours will be different...

[Jeff V.]

You'll probably need to repair the harness. The actual sensor doesn't have any wires.

[drdrewusaf]

Awesome! Glad it was a simple fix!


Drew

[HazeMyth]

Oddly enough, the dealership also said the sensor is right by the hood latch, but that's not the case. It's actually attached to the bottom of the crash bar, so when I replace this I'm going to have to take the front bumper off.

I'm also discovering, slowly but surely, that the CPO warranty is utter bullshit. It will cost me more to replace this sensor under warranty than it will to replace it myself. This is now the second or third time I've had an issue with the car that either isn't covered under warranty or costs more to cover under warranty. I stayed awake last night thinking about selling it, to be honest. I love my S5, but if I'm going to be dealing with stupid shit like this, the trunk latch breaking and FOB issues, I may very well just dump it.

[wkhanna]

maybe less an issue with the car, & more dealer......?

[HazeMyth]

maybe less an issue with the car, & more dealer......?

Totally possible. The only reason I go to this dealership is because the next closest one is over an hour away. Maybe it's worth the drive though if it means not getting jerked around when trying to use my warranty.

Edit: BTW, there is a plug right by the hood latch, but that one wasn't my issue. The sensor that's attached to the grill is the Homelink system. My errors came back yesterday when my wife and I were heading to the grocery store, so I wiggled the wire attached to the sensor that's on the crash bar, restarted the car, and the errors all went away again.

I don't have a good picture of the sensor, but I'll take an old photo real quick and mark the area of the sensor I'm talking about.

[HazeMyth]

This is the sensor that is the issue. It looks like the ambient air sensor to me, but I've now had a few different people tell me that it's right by the hood latch. Am I crazy, or.....?

(Yes, the crash bar is Flexidipped, but I did cover this sensor when I dipped it. The bar has been dipped for about 2 years without any issues to the sensor, so it's fair to say Flexidip is not to blame)

[Jeff V.]

Maybe the mounting location is different between a B8 and an 8.5? I remember mine was up near the garage door opener and I had to relocate it when I put my RS5 grille on.

[HazeMyth]

Maybe the mounting location is different between a B8 and an 8.5? I remember mine was up near the garage door opener and I had to relocate it when I put my RS5 grille on.

Every Google image I've found is consistent with the location you're saying the B8 has, for sure. Mine is mounted exactly where it was mounted from the factory. My location didn't have to change at all when I put the RS5 grille on. My homelink system sits behind the rings.

Honestly, I think I may not even need a new sensor though. I think what I need to do is get some of that shrink tubing and re-sheath the wires. I've got the smallest length of wire that's become exposed over time, and I believe that's what is resulting in the problem. When I use my fingers to bump the sheath of the wire over the small section of exposed wires, that's when my problem goes away. I suppose I have to look at this as an opportunity to clean a few things up though, that way I'm not so sour about taking my bumper off. At least when I take the bumper off I can give the crash bar a good re-spray, even though it still looks good after 2 years. I can also touch up those white tabs that show up in my grill. They have always driven me nuts, but I just never did anything about them.