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08-07-2023, 02:30 PM
(This post was last modified: 08-07-2023, 03:03 PM by marcoandre23.)
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 ?
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Mechatronic and TCM module is the same thing in this car.
Check your fuses and ground before starting to change parts.
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09-13-2023, 12:37 AM
(This post was last modified: 09-13-2023, 12:38 AM by marcoandre23.)
Problem solved reburfished gearbox and new tcm module
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08mhp 
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Problem was mecatronic, not gearbox. I havee the fix for no communication TCM
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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.
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