Fully scanned the car

[GramCracker]

I took a short trip over to AudiSport's house after my car was acting up. It would only boost to 5 PSI. It did that twice, then the next time it spiked to 19-20 and tapered to 17.

Odd, right? I thought so too.

We scanned the whole car and here is what came up:

VCDS Version: Release 805.1
Data version: 20080823

Sunday,28,September,2008,18:43:02:23844

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 H
Component: 2.7l V6/5VT G 0003
Coding: 06711
Shop #: WSC 54337

4 Faults Found:
17530 - Oxygen (Lambda) Sensor Heating; B2 S2: Open Circuit
P1122 - 35-00 - -
17526 - Oxygen (Lambda) Sensor Heating; B1 S2: Open Circuit
P1118 - 35-00 - -
17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High
P1114 - 35-00 - -
17548 - Oxygen (Lambda) Sensor; B2 S2: Internal Resistance too High
P1140 - 35-00 - -
Readiness: 0110 0101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8D0-907-389.lbl
Part No: 8D0 907 389 E
Component: ABS/ESP allrad D36
Coding: 04395
Shop #: WSC 06435

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: Redir Fail!
Part No: 8D0 820 043 P
Component: A4 KLIMAAUTOMAT D58
Coding: 00160
Shop #: WSC 01405

1 Fault Found:
00787 - Temperature Sensor in Fresh Air intake duct (G89)
30-00 - Open or Short to Plus

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8D0-959-655-AI8.lbl
Part No: 8D0 959 655 G
Component: Airbag Front+Kopf 1002
Coding: 00304
Shop #: WSC 06325

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8D0-920-xxx-17.lbl
Part No: 8D0 920 980 R
Component: B5-KOMBIINSTR. VDO D09
Coding: 02264
Shop #: WSC 00001

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 8D0-862-257.lbl
Part No: 8L0 862 257 N
Component: CV-Pump D11
Coding: 16140
Shop #: WSC 06325

2 Faults Found:
01370 - Alarm triggered by Interior Monitoring
35-00 - -
00955 - Key 1
09-00 - Adaptation Limit Surpassed

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00101
Shop #: WSC 06325

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4B0-907-357-AUT.lbl
Part No: 4B0 907 357
Component: LEUCHTWEITEREGLER D004
Coding: 00012
Shop #: WSC 06325

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 8D0-035-1xx-56.lbl
Part No: 8D0 035 195 A
Component: Radio D00
Coding: 00114
Shop #: WSC 40104

No fault code found.

End ---------------------------------------------------------------------

For the record, I have no cats and my rear O2's have been removed.

Let me know what you guys make of this! Or if there is anything important I am overlooking.

Thanks!

[AudiSportB5S4]

don't forget you had the Boost Deviation code that I had cleared RIGHT before this. haha, should of left it, it's weird that overboosted once then not again

[S4-ORCE]

Was the deviation code, negative or positive deviation?

[S4 John]

primary 02's and maybe a maf sensor? unplug the maf and see how it runs.

[GramCracker]

don't forget you had the Boost Deviation code that I had cleared RIGHT before this. haha, should of left it, it's weird that overboosted once then not again

Yea, I know. I didn't mention it because I forgot what it was called and didn't want to mess up and call it something it wasn't.

Yea, it was really odd. When it happened I thought to myself "I bet it happens a few times and then goes back to normal." Lo and behold, it did.

I'm pretty sure it was positive deviation.... Mike said it was getting too much boost (if i recall correctly).

[AudiSportB5S4]

Was the deviation code, negative or positive deviation?

positive

[AudiSportB5S4]

primary 02's and maybe a maf sensor? unplug the maf and see how it runs.

he supposedly got APR from "10sec Marc", whats funny though is Grahams car booosts up to 20 tapers to 18. I thought APR boosted 17 tapering to 15.

unplugging the MAF on the APR software doesn't usually help much, i know on GIAC you can I ran that way for 5 months LOL

[GramCracker]

Update, the car is doing the boost problem again. I'm going to unplug the MAF and see what the does.

[gointoscott]

are you running a mbc at all?

Those codes you listed are only for rear 02's and since they are gone that is why the codes are there.


that other code you recieved could be the one to fix.

I know this, for me I was getting a :
17963 - Charge Pressure: Maximum Limit Exceeded
P1555 - 35-10 - - - Intermittent

when I went to standalone mbc. reason is my mbc was allowing it to boost too high causing it to go to limp mode. (only boost to 5-6 psi)

If this sounds like what you are getting, try turning your boost down some.

I personally dont think unplugging the maf will fix it. But then again I never tried that either.

I finally went back to just using n75 and now its not overboosting like that.

[GramCracker]

I don't have an MBC, but Mike (and I) think that my N75 is shot. Could that be the culprit?

[gointoscott]

Yes if the N75 isnt working right it will allow the car to overboost and throw it in limp mode.

Why do you think the n75 is shot? Is it just a guess or do you have evidence pointing to it?


I guess if its overboosting, that would be evidence pointing to it.

[GramCracker]

Yes if the N75 isnt working right it will allow the car to overboost and throw it in limp mode.

Why do you think the n75 is shot? Is it just a guess or do you have evidence pointing to it?


I guess if its overboosting, that would be evidence pointing to it.

Its definately shot. I just boosted to 23....

Where can I pick up a new N75, and how much do they typically run?

[mholme]

N75 is probably end the 75 dollarish range from a worldpac, genuineaudiparts, etc.