New (to me) B6 -- many ECU codes :-(

[B6 Dude]

Got the car (2004 B6 avant 1.8TQ auto) last week and today it stumbled a bit and the CEL came on, so I ran the codes (with a borrowed Ross-Tech VAG-COM) and got this list. Also, I could not connect to the central locking module (to reprogram the remote windows). I am checking the codes individually on this forum, but I'm wondering if the trend indicates something more common like a wiring problem, or a problem with some part of the bus. Any assistance appreciated. Thanks!



Address 01: Engine Labels: 06B-909-518-AMB.LBL
Part No SW: 8E0 909 518 AK HW: 8E0 909 018 A
Component: 1.8L R4/5VT G 0006
Coding: 0016751
Shop #: WSC 05146

4 Faults Found:
19497 - Powertrain Databus: Implausible Engine Temp. Message from Inst. Panel
P3041 - 004 - No Signal/Communication - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded - MIL ON
16685 - Cylinder 1: Misfire Detected
P0301 - 001 - Upper Limit Exceeded - MIL ON
16686 - Cylinder 2: Misfire Detected
P0302 - 001 - Upper Limit Exceeded - MIL ON
Readiness: 0000 0000

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Address 03: ABS Brakes Labels: 8E0-614-517.LBL
Part No: 8E0 614 517 A
Component: ABS/ESP allrad 3429
Coding: 04277
Shop #: WSC 06435

1 Fault Found:
01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30
35-10 - - - Intermittent

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Address 08: Auto HVAC Labels: 8E0-820-043.LBL
Part No: 8E0 820 043 AD
Component: A4 Klimaautomat 1319
Coding: 00000
Shop #: WSC 63251

No Faults Found
or DTCs not supported by controller
or a communication error occurred

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Address 16: Steering wheel Labels: 8E0-953-549.LBL
Part No: 8E0 953 549 N
Component: Lenksáulenmodul 0611
Coding: 01042
Shop #: WSC 63251

1 Fault Found:
00474 - Control Module for Immobilizer
49-10 - No Communications - Intermittent

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Address 17: Instruments Labels: 8E0-920-9xx-8E2.LBL
Part No: 8E0 920 950 P
Component: KOMBI+WEGFAHRS. RB4 D42
Coding: 01231
Shop #: WSC 05146
WAUVC68E84A131268 AUZ6Z0C0346725

4 Faults Found:
01039 - Coolant Temperature Sensor (G2)
30-10 - Open or Short to Plus - Intermittent
01176 - Key
07-10 - Signal too Low - Intermittent
00668 - Supply Voltage Terminal 30
53-10 - Supply Voltage Too Low - Intermittent
01314 - Engine Control Module
49-10 - No Communications - Intermittent

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Address 46: Central Conv. Labels: 8E0-959-433-MAX.LBL
Part No: 8E0 959 433 BB
Component: Komfortgerát T7B 1411
Coding: 12044
Shop #: WSC 63251

Part No: 8E1959801
Component: Tõrsteuer.FS BRM 0003

Part No: 8E1959802E
Component: Tõrsteuer.BF BRM 0003

Part No: 8E0959801A
Component: Tõrsteuer.HL BRM 0004

Part No: 8E0959802A
Component: Tõrsteuer.HR BRM 0004

7 Faults Found:
00962 - Alarm via. Tilt Sensor
35-00 - -
01369 - Alarm triggered by Hood Switch
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01572 - Alarm triggered by Door Contact Switch; Passenger Side
35-00 - -
01573 - Alarm triggered by Door Contact Switch; Left Rear
35-00 - -
00955 - Key 1
35-10 - - - Intermittent
00913 - Window Regulator Switch; Front Right Driver (E81)
27-10 - Implausible Signal - Intermittent

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Address 56: Radio Labels: 8E0-035-1xx-56.LBL
Part No: 8E0 035 195 H
Component: symphony II NP2 0400
Coding: 01001
Shop #: WSC 66560

1 Fault Found:
01305 - Databus for Infotainment
37-10 - Faulty - Intermittent

End

[3thrd_a_4]

U might have a bad coilpack. First thing you want to do is clear all the codes to see which ones are old. Any present issues will set the MIL on again or generate another code

[B6 Dude]

I did that a few days ago, because the codes involved a lot of low voltages and I know the battery was replaced on the car last week. So these codes are new. I'm not sure why the alarm codes would be there though, as I didn't trip the alarm.

[A4ringedONE8T]

Swap cyl 1 & 2 coilpacks with 3 & 4 and clear the codes again. If misfires come back now on 3 & 4, the coilpacks are bad, just replace them. And quite a few of those codes are from low battery voltage, you sure they were ALL cleared after the battery change?

[orttauq]

ECT sensor seems to be faulty, which can also throw bogus misfire codes :)