may or may not help you, but they fail in strange ways
On my K1300 the TC went mental and the bike couldn't be ridden unless you deactivated TC…. ABS and speedo worked perfectly
It went in under warranty and was diagnosed with front ABS sensor (note ZFE, DME and can bus is the same on the k1300 and the K25 R series bikes), they were proud of themselves and gave the bike back. But the fault was still there. They then spent 3 hours trying to understand why the diagnosis was wrong and how they hadn't fixed it. They and BMW technical were very confused. This is the same issue my mate had on his K1300 and BMW could fix his either - on and off to the dealer over 6 months -in the end he fixed himself, (I think here the broken wire got bad enough it started to impact the ABS so when he swapped the sensors at the ECU and found the fault moved, he replaced the rear sensor).
What exactly is going ? the gist was the TC is far more sensitive than the ABS and needs perfect signals both ends to do its job or throws an error, whereas the ABS is quite happy something reaches the ECU (hence speedo and ABS were never impacted - and YES I get that sounds mental). In the end they replaced the rear sensor as well and it was fixed.... but diagnostics still said it was the front. This is because the sensors check out as OK for ABS signals but really its beginning to fail as they break the wires and get intermittent issues (which maybe the ABS just thinks is differing levels of grip under braking - where front and rear may well be doing different things). The TC being much more sensitive, is not happy with the signals the TC system is receiving and so throws the first error on the list for traction control issues which happens to be the front sensor.