gearbox malfunction a6 c7 allroad 2012

**chris.d** · 20-12-2020,05:09 PM

hi all,i am in need of some help here.
just went to start the car and get message gearbox malfunction, tried to start the car ,turns over and sometimes stars for a couple seconds and dies ,and getting messages on dash for lots of faults now h,brake lights and so on ,checked under scuttle panel for water (as i think that is where ecu is on the drivers side )but none .., last time i drove the car all was fine but it was chucking down rain heavy though !! .
any ideas ??????????????

**kite** · 20-12-2020,05:20 PM

Sounds like a low battery to me.
Engine starting and cutting out could be the immobiliser.

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**chris.d** · 20-12-2020,05:36 PM

Originally Posted by kite

Sounds like a low battery to me.
Engine starting and cutting out could be the immobiliser.

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hi thanks for your thoughts , but it is turning over quite strong and i did not have any low battery warning recently

**beemerboy9** · 20-12-2020,08:38 PM

It's likely a poor connection, but you will need to get the car scanned to find out the location.

15 years ago I remember a gearbox going into limp mode because a cable on the brake pedal had become disconnected. The problem was only diagnosed after 2 gearbox rebuilds!

**chris.d** · 20-12-2020,09:40 PM

Originally Posted by beemerboy9

It's likely a poor connection, but you will need to get the car scanned to find out the location.

15 years ago I remember a gearbox going into limp mode because a cable on the brake pedal had become disconnected. The problem was only diagnosed after 2 gearbox rebuilds!

hi thanks for that hope you are right .i have rac coming in the morning so i get diagnostic free .

**marciolo** · 21-12-2020,07:32 AM

I would check gearbox cable connection

**chris.d** · 21-12-2020,11:49 AM

ok. rac man been here for an hour did a reset of all the faults .then his diagnostics states no communication between gearbox brakes.steering etc
so looks like i have to get it to a garage but local one is shut until jan 4th so will have to wait until they re open .as they do have a audi trained mechanic who does the audi repairs at a reasonable rate

**philipharmes** · 21-12-2020,12:19 PM

Have you checked all the fuses in the engine bay, at the ends of the dash & in the boot ?

One large fuse may provide power for several electronic modules.

**chris.d** · 21-12-2020,12:23 PM

Originally Posted by philipharmes

Have you checked all the fuses in the engine bay, at the ends of the dash & in the boot ?

One large fuse may provide power for several electronic modules.

hi yes rac man went through the fuses

**Elansear** · 21-12-2020,01:26 PM

Hi as has been mentioned by others it sounds like a wire loom problem, perhaps as you mentioned heavy rain, water ingress in a connector possibly under the car. As you are going to have to wait might be worth getting a big can of WD40 and give any accessible connections a good spray, you have nothing to loose perhaps worth trying to get a cheap hand scanner to assist in seeing if that helps. Good luck.