misfire 3 cylinder showing code p0303 -check engine light flashing -coil is good - spark plug had fresh oil on it with carbon build up -changed spark plug and still misfiring -took vehicle to the dealership and referred to tsb-13-082 v6 misfire extended warranty - mechanic … Honda will extend the powertrain warranty for 8 years from purchase date with unlimited miles. If others are within the eight years, Honda will help some.