1999 Jeep Grand Cherokee P0720 Fault: How to Fix Speed Sensor Issue?

I'm experiencing a P0720 trouble code on my 1999 Jeep Grand Cherokee. This model has a speed sensor located in the rear wheel anti-lock brake system, and I've been trying to resolve this issue myself. Approximately four weeks ago, I had my throttle position sensor replaced at a dealership, and about 900 miles later, the P0720 code appeared. The fact that it's showing up after such a recent service makes me suspect a connection or interference—though I'm not sure what exactly. I'd like to know if there's a specific fix for this code on my model, especially since I'm considering doing the repair myself.