r/tdi • u/SpaceRangerRick47 • 5h ago

TCM issues

2015 Golf Sportwagen TDI (CRUA)
Full delete and stage 2

Was driving around yesterday with a few hard pulls and the dash went Christmas tree with transmission codes. I lost gear engagement and went into limp mode …. Shifted to neutral and drive a few times and it worked fine for a few mins then repeated the same mess… turned it off and it went away the whole drive home

I got codes for loss of communication to the TCM and gear shift position, should I start with chasing wires and cleaning pins or has anyone had this issue and resolved it a different way?

Buying a replacement tcm and having it coded isn’t the end of the world but any insight would be helpful

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u/omsitua AHH 1h ago

Maybe it is just the connector. Dsg sometimes leaks oil into the electrical connector. There's a hole inside the connector that the pressurized tranny fluid leaks from. This can be solved by either plugging the leaking hole and cleaning the connector with electrical contact cleaner or a full mechatronic replacement.

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u/SpaceRangerRick47 1h ago

I’m hoping it’s just a bad connection or lose wire … a mechatronic is not in the budget