SUBARU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ENGINE CONTROL MODULE (ECM) REPROGRAMMING. UNDER CERTAIN SEVERE DRIVING PATTERNS, SUCH AS HIGH SPEED HIGHWAY/UPHILL DRIVING AND/OR ACCELERATING WITH HIGH ENGINE REVOLUTIONS, THE EFFICIENCY OF AN AFFECTED VEHICLE'S CATALYTIC CONVERTER MAY BEGIN TO DEGRADE BEYOND DESIGN PARAMETERS. CSC LETTER WAS RECEIVED. *PE
