C8 Transmission Control Unit Failure

Sounds familiar. I own a C8 too, and had almost the same thing. Paddle shifters acting up, gearbox feeling like it's rowing through treacle. Emergency mode is a pain, isn't it? Does the error memory point to anything specific, like a TCU malfunction code?

The error code does indicate a potential issue with the TCU. Did you have to replace the control unit, and did that fix the problems? What did it cost?

Yep, TCU was the culprit. Bit of a nightmare. After a lot of head-scratching and diagnostics, replacing the unit sorted it. You could try checking all the wiring and connections first, but based on your symptoms and error code, I'd say you are looking at a new TCU. Get a quote from a decent workshop; it's not a cheap fix but needs doing right.

Thanks. I'll schedule an appointment at a workshop for a diagnosis and TCU replacement. It looks like it will cost about 1000€.