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P0C29 Auxilary Transmission Fluid Pump Driver Fault: FIXED!
10K views
Jan 1, 2025
A common fault I've seen all to often, which is regularly attributed to the latest 23X4 software installed on various VW Audi Group vehicles. Watch the video, it shows you exactly how we sorted this one!
View Video Transcript
0:03
we're seeing more and more people come
0:05
to us with these intermittent weird DSG
0:08
faults after the car's been into
0:10
Volkswagen and had a software update
0:12
I've got a ladin today who's driven all
0:13
the way from Manchester cuz to be honest
0:16
with you I was the only person that
0:17
offered to help him I'm using end user
0:20
tools like obd11 to try and diagnose
0:23
this problem and I wanted to do this in
0:24
a way that it would show to the GTD
0:27
owners group so that if you get these
0:28
problems you don't panic about and you
0:30
don't get your eyes ripped out for new
0:32
gearboxes so this car is bringing up
0:34
this fault
0:36
code P0
0:39
c29 auxiliary transmission fluid
0:44
pump it never did it before it went in
0:47
for the software update and now the
0:49
car's just constantly throwing up lights
0:51
on the dashboard I think we can fix this
0:54
just by doing a software roll back on
0:57
the vehicle so let's just show you what
0:58
we're going to do because vol have said
1:00
this isn't possible we've got my battery
1:03
support unit linked up to this we've got
1:05
autot tuner on we're plugged in and good
1:07
to
1:08
go we're going to do this as a virtual
1:10
right from the
1:13
server we're going to do this in real
1:15
time as well so this is the software
1:18
version that we're on let's just roll it
1:20
back to what are we going to go with
1:22
let's just go back to how it originally
1:24
left the factory let's give that a try
1:26
so it's connecting to the ECU it's AR
1:28
raise the data in the first block of
1:30
data and now it's flashing new data in
1:33
the dashboard's having a fit and saying
1:35
everything's
1:37
broken but it doesn't have a gearbox
1:39
light on which it did before so that's a
1:41
plus
1:44
point this process should take a couple
1:47
of minutes and fingers crossed we will
1:49
undo what Volkswagen did and then later
1:52
on we'll talk about this gearbox update
1:54
and how it's the just the worst thing in
1:56
the world and then Volkswagen will
1:57
probably come after me but I can fix it
1:59
so it's
2:00
so this is now flashed that took 5
2:04
minutes before we permanently had the
2:08
gearbox warning light on the
2:10
dash are you're going to join me for a
2:13
first start to see if the fault has
2:16
disappeared I am doing this real time so
2:20
you have to bear with me I did skip a
2:22
bit of The Flash cuz no one cares about
2:24
watching this green flash for 5 minutes
2:27
right
2:34
okayy
2:37
off ke
2:41
on reverse neutral
2:44
drive at this point we've got no lights
2:46
on the
2:48
dash everything's looking
2:55
good should we go for a drive and see if
2:57
I fixed it
2:58
[Laughter]
3:01
be a happy man if it does so previously
3:04
this car had just constantly had a light
3:07
on the dash the the um gearbox warning
3:10
light was on the dash constantly um so
3:12
far we've got about 200 yards and
3:15
there's no light on the dash I'm trying
3:17
to keep this as focused on end user as I
3:19
can so I'm doing my logging on this to
3:21
see that everything's working using
3:24
obd11 because if you've got a Volkswagen
3:26
particularly a GTD you should have obd11
3:29
cuz it gives you the ability to do the
3:31
sort of stuff that I do so I'm just
3:33
going to look now we've got currently no
3:35
Faults in the transmission go right here
3:37
and up the
3:38
hill currently there are no Faults in
3:41
the
3:43
transmission and we've got no
3:46
lights all in all this is going pretty
3:49
well so far so whil we're driving around
3:51
I should probably tell you what causes
3:53
this VW did the 23 X4 recall and that
3:58
has something to do with the auxiliary
3:59
oil pump inside of the gearbox if you
4:03
Google Volkswagen 23 X4 you'll get a
4:07
myriad of that's a good word Myriad left
4:10
just here yeah left here you'll get a
4:11
myriad of people complaining about this
4:15
full code coming up after a
4:18
flash if your gearbox is in software
4:21
version
4:24
1637 1637 it has that update on it I'm
4:28
going to use my obd11 now to show you
4:30
how to check that
4:32
so open your obd11 up click on
4:37
transmission which is block two click on
4:39
info you can see this information here
4:43
software version we're on
4:45
1401 if that is 1 what is it
4:53
1367 software version
4:58
1401 we've gone back to the original
5:01
software on this car and we've been out
5:03
for a drive now for about 5 6 miles no
5:05
fault everything good customers picked
5:07
up on a few things the car's not racing
5:09
to always get into the higher gears
5:11
which is nice it's holding those gears
5:13
for a little bit longer which makes the
5:14
car sport you the drive makes the
5:16
throttle pedal sharper and just
5:17
generally makes it nicer to drive so if
5:19
VW could stop sending out software
5:22
updates that would be that would be
5:24
fantastic yeah just just put your foot
5:27
down really and let it Rev
5:30
just let it do a gear change and
5:34
we'll
5:36
perfect so we got no warnings on here
5:39
couple of miles in and we've got no
5:40
warnings on there everything so far is
5:44
looking
5:46
good right great news um we've had this
5:48
in now we've done a quick software
5:51
downgrade on it we've been out for a
5:53
20-minute Drive the car's fixed it
5:54
drives sharper there's no issues no
5:56
fault codes on the dash the lad's been
5:58
driving around with lights over his dash
6:00
for ages and warnings in the
6:01
infotainment screen and stuff and we
6:03
have fixed it by downgrading the
6:04
software so what's the point of all of
6:07
this there's so many people out there
6:08
that I see posting on the GTD owners
6:10
groups and Pages all the time crying on
6:13
about how the fact their gearbox doesn't
6:15
work and they've had this 2 3x4 software
6:18
update then they go to the main dealer
6:20
the dealer doesn't take them seriously
6:21
and tells them they need a new box and
6:22
quote a couple of grand I'm not saying
6:25
this is going to fix every gearbox
6:27
problem however when you speak to most
6:29
tuners and most places they don't want
6:31
to get involved in issues with gearboxes
6:34
because they're quite costly to fix
6:36
however I'm pretty confident that in
6:38
most cases if you've had this software
6:40
update we can fix it just by Rolling the
6:42
software back more public service
6:44
announcements from Northeast tuning
6:47
specifically for the GTD owners group so
6:49
enjoy I hope this has been good
6:50
information for you all I'm going to
6:52
send this lad back to Manchester he's
6:54
driven like an 8 Hour round trip for a
6:55
20-minute job but got the outcome you
6:58
wanted
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