Audi A6 2.0l tdi 2015 Auto
 

So I was driving on motorway when suddenly a yellow triangle appeared on my dash ‘gearbox malfunction limited functionality’. 
 

Switched the car off and back on the the warning had disappeared. As I was driving back and 50 miles into my journey it appeared again but shortly after the car slipped out of gear with a  red warning ‘gearbox malfunction put car in P and stop’ (something like that). 
 

I stopped the car and the car was not going into gear at all. After switching off and back on it seemed ok with no warnings but maybe around 5 miles after it happened again so had to pull over. It happened a few times until I then got the car recovered home. 
 

anyone else had this issue? 

I'd recommend a diagnostic check to see if any fault codes flag up. When was the gearbox last serviced? 

Could it be an issue with the megatronics? 

Hi Steve, thanks for your reply. The car is at 52k and I purchased it around 4 months ago. The gearbox hasn’t been serviced since new so have asked the garage to service it while it’s their. 
 

The codes were below and I’ve been told it’s the ECU TCM that is faulty so it’s currently being fixed. The last 4 codes are due to the faulty ECU so should clear once the new part is fitted. Apparently they have to program the ECU too…
 

 2.U102600 Transmission Control Module - Check DTC Memory

1.P0C2C00 Auxiliary Transmission Fluid Pump Control Module - Feedback Signal Range/Performance

2.P0C2A00 Auxiliary Transmission Fluid Pump - Motor Stalled

3.P0C2800 Electric/Auxiliary Transmission Fluid Pump "A" - Motor Current High

4.P0C2900 Auxiliary Transmission Fluid Pump Driver - Circuit

Keep us posted on how you get on 🙂

On 7/10/2024 at 12:08 PM, raz2209 said:

Hi Steve, thanks for your reply. The car is at 52k and I purchased it around 4 months ago. The gearbox hasn’t been serviced since new so have asked the garage to service it while it’s their. 
 

The codes were below and I’ve been told it’s the ECU TCM that is faulty so it’s currently being fixed. The last 4 codes are due to the faulty ECU so should clear once the new part is fitted. Apparently they have to program the ECU too…
 

 2.U102600 Transmission Control Module - Check DTC Memory

1.P0C2C00 Auxiliary Transmission Fluid Pump Control Module - Feedback Signal Range/Performance

2.P0C2A00 Auxiliary Transmission Fluid Pump - Motor Stalled

3.P0C2800 Electric/Auxiliary Transmission Fluid Pump "A" - Motor Current High

4.P0C2900 Auxiliary Transmission Fluid Pump Driver - Circuit

Hi 

Did you fixed your car I'm having the same issue dealership replaced the v552 pump which didn't work .

Please let me know if fixed yours 

Thanks

Hi,

I did yes- it was the Mechatronic unit. The part cost £1300 plus vat!

Are you getting same codes as mentioned in my previous post?

Thanks for replying 

Ya I'm getting the same codes gave it to dealer last week they replaced v552 pump ,paid 1500€ I collected the car broke down again after 30 minutes .now dealer wants 4900€ to replace the mechtronic Im just going to rebuild the mechtronic 

Thanks again 

Edited October 8, 20241 yr by Jahedeb12

Hi im getting the same problem they done a software update it fixed it for maybe a week but same codes again have showed the garage says the mechatronic needs replacing for over 3.5k what part did you replace for 1.3k? Please advise me thanks

Hello all, 

I have the same issue since a while now. Initially it was an single time issue then it became an intermittent issue. Then I figured out while pressing the brake before even touching the start button, it bypass the error. 

However, I decided to solve the issue and ran a diagnostic where the main error was 

 

P0C2900 - Auxiliary transmission fluid pump driver circuit , Performance 

 

After this, we ordered  a new coolant with the following reference (0CK325583J upgraded version, 2019 -) initial version is H but vendor recommended J). https://www.oemvwshop.com/0ck325583h-engine-p546436/

So upon installing this with a new oil and gasket kit, and upgrading the software from v0002 to v0008 the error is back, yet different. 

This time the error show when turning on the car (one click and engine off) but goes away once the turning the engine and error disappears. 

Any ideas? Is there a error memory or an adaptation procedure? 

Thanks