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Forum LockedTiptronic code P1750 Supply voltage too low

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ben View Drop Down
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Joined: 29-Dec-2007
Location: Finland
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Posts: 157
  Quote ben Quote  Post ReplyReply Direct Link To This Post Topic: Tiptronic code P1750 Supply voltage too low
    Posted: 14-Oct-2016 at 14:23
Hello all,

I have had quite persistent but seemingly harmless problem with my Tiptronic for some time already.
On starting the engine usually all Tiptronic range indicator letters are lit and there is the following trouble code:

Address 02: Auto Trans       Labels: 01V-927-156.LBL

   Controller: 3B0 927 156 AG
   Component: AG5 01V 4.0lWR8 RdW 1821
   Coding: 01101
   Shop #: WSC 26751
   VCID: 6BA94FC10A9D

1 Fault Found:

18158 - Supply Voltage: too Low

            P1750 - 35-00 -   -

Despite the code, the tip seems to work OK and I cannot tell a difference when the code is on or off. I can get rid of the code (temporarily) by doing an extra switch-off-switch-on before starting the engine :p

So far I have checked the fuses related to transmission (F31/15A & F15/10A), changed a new battery, checked whether there is water under passenger's side carpet (it was completely dry), cleaned the TCM's connector and even bought a new TCM from ebay since a friendly mechanic was pretty sure my TCM is faulty.

But the trouble code still keeps on coming back.

So, would you have any ideas or experience with this problem? I'm starting to get quite clueless in trying to tackle it...

Br, Ben

Edited by ben - 14-Oct-2016 at 14:30
* W8 Variant -02 / 341000 kms
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