Diagnostic codes: Is my hybrid battery failing?

Just saw Saggu Automotive Repair mentioned by a member in a different thread, the location isn't great for me but at least they have decent hours (including Saturdays)
Prius Service | Repairs | Kent, WA

the other place I'm considering is Northwest Automotive Hybrid Car Maintenance and Repair by Certified Mechanics, Seattle, Bothell

 

Ended up going to Saggu last Saturday. Knew I was in good hands when I drove up & saw more than half the cars there were Prii, with several taxis. When I described the CEL & the noise, the mechanic checking me in said almost 100% certain both caused by the 3-way valve. 2.5 hours (and $341, including our crazy 10% tax) later, done. I think I may even return for oil changes since they really seem to know their stuff.