OBD code U0284
Are you sure about that code? It may indicate some sort of network communication error but there is no listing for that number. Since your car is under warranty, take it to a Subaru dealer. http://www.totalcardiagnostics.com/support/Knowledgebase/Article/ View/21/0/genericmanufacturer-obd2-codes-and-their-meanings
Ditto. PO284 is a Ford code, btw.
found diagnosis at dealer; (lost communication with active grill shutter module.) the grill shutter was not opening or closing. This was a hard code and dealer only reset.
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