Help! VCDS biff..

[Degsy100]

Hi,

Can anyone help with this problem. I connected my Ross-Tech VCDS in order to check for fault codes. It seems that after disconnecting, i have rough idling along with a rattling noise??!! Can the fuel mapping, or Injection timing be altered purely by connection?

The noise stops if the engine revs are increased, but is there on start-up and idle.

There was no noise before I conneted, and no faults were logged! None of the settings were changed or even viewed. Now I'm confused!

Can anyone with a clue shed some light on it? Thanks in advance.

Degsy

[martin1810]

It helps if you post an autoscan and give details of make/model/engine/yesr etc. No VCDS cannot cause changes to occur...You have to make them.

[Crasher]

Sometimes clearing codes can make an engine in limp mode run rough, did you clear any codes?

[Degsy100]

Hi guys, cheers for your replies.

Audi A4 Avant 1.9tdi 2004 Multitronic

I cleared the following codes. I didnt know that the trans faults could have an impact on the running of the engine. There were no engine faults logged, only the 2 transmission ones below.
It is occasionally in limp mode, but for the G/Box ECU fault. I have the occasional flashing PRNDS block. I plan to remove the ECU? (Magic Box) and send it away for repair. Any advice on that too would also be great.

Thanks again.

Degsy

Address 02: Auto Trans Labels: 01J-927-156.lbl
Control Module Part Number: 8E0 910 155 C HW: 01J 927 156 HH
Component and/or Version: V30 01J 1.9l PD RdW 3220
Software Coding: 0000001
Work Shop Code: WSC 63251 000 00000
VCID: 25446D939571
2 Faults Found:
17090 - Transmission Range Sensor (F125): Implausible Signal
P0706 - 000 - -
Freeze Frame:
RPM: 96 /min
RPM: 0 /min
RPM: 0 /min
(no units): 1.0
Torque: -32.0 Nm
Temperature: 45.0°C
T.B. Angle: 0.0°
Bin. Bits: 0001 0 0
18201 - Transmission Output Speed Sensor 2 (G196): No Signal
P1793 - 000 - - - Intermittent
Freeze Frame:

[Crasher]

You need a new gearbox ECU.