2003 Audi A6 3.0L V6 bucks & jerks when taking off

Asked by Sep 06, 2016 at 09:47 AM about the 2003 Audi A6 3.0

Question type: Maintenance & Repair

We bought a 2003 Audi A6 3.0L V6 with 112K miles.  It jerks and bucks when
we take off from a standstill and sometimes it jerks a little when driving.  We
have a CVT auto transmission.  The jerking seems to be better when we drive
in the tiptronic mode.  We read a TSB on the 3.0 bucking/jerking problem but
haven't done it due to an oil pressure light (fix calls for driving it).  When we try
to read TX faults, our reader (Xoom VAG 401) can't talk to the TX.  The reader
displays a TCU identifier that's very brief (unlike the Engine and ABS ID's) and
then it always "fails to communicate."  So we don't know what fault codes are
on the transmission.  We're thinking we may have to change the ATF, update
the code on the TCU and then follow the steps in TSB #38 08 2011722/8.  Or
maybe this is a fuel supply problem (i.e., not a steady stream reaching the
engine)??  Has anyone seen this before or have any ideas about how to fix?

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