Why does the brake warning light flash?
Low brake fluid level, worn brake linings and or pads, failure in the anti-lock system, just to mention a few.
Thanks for trying. Suggestions are in the manual but none apply.
Unplug the fluid level sensor on the master cylinder reservoir an see if the light goes out, if it does then you have a bad level sensor, you can replace it or just leave it unplugged, but remember to keep an eye on the level. If it doesn't turn off then look at park brake switch, make sure it is connecting and disconnecting properly, if it is misadjusted it could cause a flash. HTH
Looking for a Used Outback in your area?
CarGurus has 552 nationwide Outback listings starting at $3,900.
Search Subaru Outback Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Subaru Outback Experts