NHTSA Complaint #11089943 — 2009 NISSAN ALTIMA

CARBON BUILD-UP ON VALVES CAUSING MISFIRE AND THE BREAK DOWN OF THE CATALYST. CODES P0300 AND P0303 STORED IN ECM. REQUIRED REPLACEMENT OF LONG ENGINE ASSEMBLY AND EXHAUST MANIFOLD. INITIALLY, DEALERSHIP CITED NEED TO REPLACE IGNITION COIL, SOFTWARE UPDATE, FUEL LINE FLUSH. PICKED UP CAR AND IMMEDIATELY THE SERVICE LIGHT CAME BACK ON AND CAR BEGAN TO MISFIRE. RETURNED TO DEALERSHIP WHO SURMISED THAT THERE MIGHT BE A LOOSE WIRE. NOT THE ISSUE. DEALER CONTACTED NISSAN CORPORATE FOR DIRECTION WITH DIAGNOSTICS. CAR MILEAGE 59,802.