Went to clear my persistent P0420 code today in preparation for emissions testing and noticed I also have a P0500 code in the history. No CEL right now. No symptoms. The speedometer works fine.

I will clear the codes and see if the P0500 returns.

Any suggestions where to look, what to do?

Edited May 23, 201510 yr by brus brother

Cardoc has good info in this thread: http://www.subaruoutback.org/forums/66-problems-maintenance/23109-transmission-threw-code-p0500-speed-sensor-2.html

Also there is a link to a thread for getting ABS codes.

Check the wiring for the front ABS sensors. Also make sure no metal flakes are stuck to the sensors.

Thanks for the link Fairtax. I cleared the code and will monitor if it comes back. No symptoms to report yet. Perhaps a squirrely patch of ice or gravel set the ABS into puzzlement mode.