I found no mention of a power steering filter in the owner's manual or in the service manual for Outback.
Same as any car with power steering. You can continue to steer the car but with increased effort.
use a turkey baster to suck it out.
The 2014 Subaru Outback is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2003 Subaru Outback is 5 ft. 8.7 in. (68.7 in.)1 one-touch power windows wide.
The 2008 Subaru Outback is 5 ft. 9.7 in. (69.7 in.)1 one-touch power windows wide.
The 2007 Subaru Outback is 5 ft. 9.7 in. (69.7 in.)1 one-touch power windows wide.
The 2004 Subaru Outback is 5 ft. 8.7 in. (68.7 in.)1 one-touch power windows wide.
The 2012 Subaru Outback is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2011 Subaru Outback is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2005 Subaru Outback is 5 ft. 9.7 in. (69.7 in.)1 one-touch power windows wide.
The 2013 Subaru Outback is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.