When I got this car I chased all kinds of ABS issues and finally got it all fixed. (New LF hub, and new RF harness)
One was a bad wheel speed sensor in the left front. About 1000 miles later I'm getting a C1225 LF wheel speed excessive variation.
Sounds like my new hub is a piece of crap, or try the wiring harness first? FWIW, it acts up most at low speeds and when turning.
I seem to recall every other time it was the harness, it caused a open or shorted sensor code.