jaydubyagee

Posted in the B5 forum thought this might be a better place.

My S4 just blew its second generator in 8 months, resulting in a dead then a disconnected battery. After replacing the generator, my 2001 S4 is throwing countless error codes, will not maintain a smooth idle, cuts power while underway, is basically undrivable.

I went back and checked my work, did not see anything loose or obviously wrong. After clearing codes, some come back immediately, others will come back in a minute or two. The codes that come back are somewhat randomized, but the M0103 and P1857 are consistent. I was concerned about battery because it was seriously drained after the failure, but battery voltage is w/in acceptable range (about 13 v), generator is putting out appropriate voltage (13-14v). MAF is providing consistent readings despite error code. Because of the variety of errors, am afraid it could be something major.

Attached, VAG output. Hoping someone has a recommendation or I may be forced to visit the stealership or take a flyer on a new ECU, MAF, etc.


VCDS Version: Release 10.6.0 (x64)
Data version: 20100630

Monday,23,August,2010,17:22:13:26974

Chassis Type: 8D - Audi A4 B5
Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77

-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AZA.lbl
Part No: 8D0 907 551 M
Component: 2.7l V6/5VT G 0001
Coding: 06711
Shop #: WSC 06435
VCID: 3479D17C2E50

2 Faults Found:
16487 - Mass Air Flow Sensor (G70): Signal too High
P0103 - 35-00 - -
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
Readiness: 0010 0101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8D0-907-389.lbl
Part No: 8D0 907 389 E
Component: ABS/ESP allrad D56
Coding: 04395
Shop #: WSC 06435
VCID: 357FEC78252A

1 Fault Found:
18265 - Load Signal: Error Message from ECU
P1857 - 35-00 - -

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8D0-820-043-1D.lbl
Part No: 8D0 820 043 P
Component: A4 KLIMAAUTOMAT D58
Coding: 00160
Shop #: WSC 06435
VCID: 2D4FC418CD7A

1 Fault Found:
01206 - Signal for Duration of Ignition Off Time
27-10 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8D0-959-655-AI8.lbl
Part No: 8D0 959 655 G
Component: Airbag Front+Kopf 1002
Coding: 00306
Shop #: WSC 06435
VCID: 3A65FF440C34

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8D0-920-xxx-17.lbl
Part No: 8D0 920 981 B
Component: B5-KOMBIINSTR. VDO D12
Coding: 02264
Shop #: WSC 06435
VCID: 2B4BCA00F36E

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 8D0-862-257.lbl
Part No: 8L0 862 257 N
Component: CV-Pump, Alarm, RC D16
Coding: 16136
Shop #: WSC 06435
VCID: 40918DAC6AE8

9 Faults Found:
01367 - Central Locking Pump Run Time Exceeded (Likely Leak)
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01372 - Alarm triggered by Door Contact Switch; Rear Passenger Side
35-00 - -
01374 - Alarm triggered by Terminal 15
35-00 - -
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01369 - Alarm triggered by Hood Switch
35-00 - -
01365 - Lock/Unlock Switch; Interior
29-00 - Short to Ground
00991 - Interior Lights
28-00 - Short to Plus
00956 - Key 2
09-00 - Adaptation Limit Surpassed

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00102
Shop #: WSC 06435
VCID: E0D1ED2C4A28

1 Fault Found:
01383 - Alarm triggered by Anti-Theft Sensor; Front Right
35-00 - -

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4B0-907-357-AUT.lbl
Part No: 4B0 907 357
Component: LEUCHTWEITEREGLER D004
Coding: 00012
Shop #: WSC 06435
VCID: E5DFFC38550A

1 Fault Found:
00774 - Level Control System Sensor; Left Rear (G76)
31-00 - Open or Short to Ground

-------------------------------------------------------------------------------
Address 56: Radio Labels: 8D0-035-1xx-56.lbl
Part No: 8D0 035 195 A
Component: Radio D00
Coding: 00110
Shop #: WSC 06435
VCID: 2459213C9EB0

No fault code found.

Dana @ Ross-Tech

I know you already checked your work, but replacing the alternator on a 2.8L B5.5 Passat is a task. In this case, with the 2.7T, was removing the front end necessary? I would imagine it was, and the Charge Pressure Control problem could be related to an intercooler (boost) leak.