ABS Lamp and Traction Problems

Whoa, sounds familiar! I had almost the exact same thing happen in my S80. Speedometer went nuts, ABS light came on, the whole nine yards. Have you checked the ECM?

The ECM? Where exactly is that, and what should I be looking for? I'm not exactly a mechanic, haha.

Think of the ECM like the car's brain, usually under the hood. But honestly, based on your symptoms, it sounds like the ABS control unit is defective. Mine was, and it cost me a fortune to fix. Just take it to a workshop.

I suspected it might be something like that. I took it to the workshop, and you were spot on - affected control unit defective! Cost me about 1000€, but at least it's sorted. Appreciate the heads-up!