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+---- Thread: Audi a3 8v TCM fault (/Thread-Audi-a3-8v-TCM-fault)
Audi a3 8v TCM fault - marcoandre23 - 08-07-2023
Hi guys need your help or your opinion .
I have here at my workshop audi a3 8v with tcm fault lost communication on engine module and diag wont connect to tcm module .
This car wont start and Stuck in P and blinking but sometimes start and runs without problem.
U010100 Lost Communication with TCM
I checked all power supply and lines can everything seems fine .
Probably bad TCM module on mechatronic right??
Has anyone had a similar problem ?
Thanks
RE: Audi a3 8v TCM fault - marcoandre23 - 08-07-2023
(08-07-2023, 02:30 PM)marcoandre23 Wrote: Hi guys need your help or your opinion .
I have here at my workshop audi a3 8v with tcm fault lost communication on engine module and diag wont connect to tcm module .
This car wont start and Stuck in P and blinking but sometimes start and runs without problem.
U010100 Lost Communication with TCM
I checked all power supply and lines can everything seems fine .
Probably bad TCM module on mechatronic right??
Has anyone had a similar problem ?
Thanks
Anyone??
RE: Audi a3 8v TCM fault - jaxone - 08-08-2023
Mechatronic and TCM module is the same thing in this car.
Check your fuses and ground before starting to change parts.
------------------------
DSGFILES - FRF /SGO to BIN and BIN to SGO / FRF for ALL DSG Gerabox files on Demand ! (ORI and Remapped DSG files).
Gearbox and ECU remapping services !
RE: Audi a3 8v TCM fault - marcoandre23 - 09-13-2023
Problem solved reburfished gearbox and new tcm module
RE: Audi a3 8v TCM fault - Michel R32 - 09-13-2023
why the gearbox?
RE: Audi a3 8v TCM fault - marcoandre23 - 09-15-2023
(09-13-2023, 01:19 AM)Michel R32 Wrote: why the gearbox?
many filings and very grey oil
RE: Audi a3 8v TCM fault - 08mhp - 10-04-2025
Problem was mecatronic, not gearbox. I havee the fix for no communication TCM
RE: Audi a3 8v TCM fault - Mayday007 - 05-28-2026
(10-04-2025, 11:01 PM)08mhp Wrote: Problem was mecatronic, not gearbox. I havee the fix for no communication TCM
What's the fix for no communication with tcm? Having the problem now
RE: Audi a3 8v TCM fault - garyr - 05-31-2026
Loose connections inside TCM is the main issue . Get some solder and flux that can hold to steel . Scrape silver coating off pads until you see copper . Solder back loose wires to pads . And you should be good to go.