Traveller Speed Signal Fault

Sounds familiar. I had similar issues with my old Volvo a while back. ABS and traction control going nuts. Have you checked the sensor connections? Could also be ECM related.

Sensor connections, ok. Which sensor are we talking about exactly? Also, would that affect the odometer reading somehow?

The ABS sensor, usually located near the wheel hub. In my case the control unit was defective. Speed signal issues can also affect the transmission and odometer, yes. I'd take it to a workshop to get it diagnosed properly.

Thanks for the advice. Turns out the affected control unit was defective, just like you said. Cost me around 1000€ to repair. Appreciate the help!