TRANSMISSION ISSUE - Error Code P0750

**dbphotos** · 05-09-2021 01:02 PM

2013 S5 with 79,714 miles.

Ever since they updated transmission software (pre-covid) I have been having rough shifting from 1st to 2nd and 2nd to 1st as well as coming to a stop. Maybe a coincidence. A few days ago I got the dreaded transmission malfunction and TPMS malfunction simultaneously. I pulled over turned off the car and it cleared itself.

My initial research had me thinking I was looking at the expensive and common problem of having to replace the mechatronics unit. Audi knows this is a widespread problem and should issue a recall to fix it or at least cover the repairs. My research shows that the manufacturer of the part knows there is an issue and hasn't been able to fix it yet, however, there is a company in the UK that will repair it and guarantee the repair for $580 plus shipping.

I just ran a scan of codes and it appears the codes I'm getting are the P0750 which says I have a "shift solenoid A" failure, and 8955 Valve 3 in partial transmission1 mechanical malfunction. Has anyone else had a similar issue? Did having "solenoid A" replaced fix the problem? I don't want to just start fixing things to find that doesn't solve the hard shift issue. Looks like the cost of the parts is about $100 and the labor cost should be between $250-500. Does anyone have any experience with this? What should I expect to have done to resolve the issue?

Thanks for any input.

David

P0750 error no vin.PNG

**hahnmgh63** · 05-09-2021 06:00 PM

When is the last time you had the transmission serviced? Being that it is a 2013 then it is a good chance that it's the Mechatronic. Who updated your TCU software? Dealer? Do you have a engine/DSG tune?

**SteveRS4** · 05-10-2021 10:12 AM

You can get a mechatronic repair kit now save you getting a whole replacement but don't get them from eBay unless they are genuine oem with the correct part code. You need a oem one this replaces both clutch 1 and 2 seloniod's for clutch pressure and new PCB wiring harnesses plus another seloniod but I can't remember what that one is off the top of my head.
Yours being a 2013 will have a Generation 1 in it you want a Gen 3 and you can tell by the PCB wiring harnesses as the Gen 3 has muti colour wiring. So make sure you get this one as it's the latest version and should solve your problems.
Part number is in the first picture sorry it's the only one I have it's not that clear I'm afraid.

Sent from my SM-G920F using Tapatalk

**SteveRS4** · 05-10-2021 10:18 AM

Just looked part number up it is 0B5 398 048 D

Sent from my SM-G920F using Tapatalk

**dbphotos** · 05-13-2021 10:11 PM

Originally Posted by hahnmgh63

When is the last time you had the transmission serviced? Being that it is a 2013 then it is a good chance that it's the Mechatronic. Who updated your TCU software? Dealer? Do you have a engine/DSG tune?

Transmission service by dealer at 65,000 miles. Dealer updated TCU at the same time. No engine tune.

Sent from my Pixel 5 using Audizine Forum mobile app

**dbphotos** · 05-13-2021 10:12 PM

Originally Posted by SteveRS4

You can get a mechatronic repair kit now save you getting a whole replacement but don't get them from eBay unless they are genuine oem with the correct part code. You need a oem one this replaces both clutch 1 and 2 seloniod's for clutch pressure and new PCB wiring harnesses plus another seloniod but I can't remember what that one is off the top of my head.
Yours being a 2013 will have a Generation 1 in it you want a Gen 3 and you can tell by the PCB wiring harnesses as the Gen 3 has muti colour wiring. So make sure you get this one as it's the latest version and should solve your problems.
Part number is in the first picture sorry it's the only one I have it's not that clear I'm afraid.

Sent from my SM-G920F using Tapatalk

Thank you!

Sent from my Pixel 5 using Audizine Forum mobile app