TECHNICAL SERVICE BULLETIN: FUEL PUMP FILTER INSPECTION/REPLACEMENT - This bulletin provides information associated with the 'Warranty Extension Program' (WTY028) to inspect and, if necessary, replace the fuel pump filter assembly on 2016-2020MY Optima (JFa) vehicles produced from August 28, 2015 through June 23, 2020, for repairs that may be necessary to address a low-pressure fuel pump failure to be covered for 15 years / 150,000 miles, whichever comes first starting from the date the vehicle was first put into service. The affected vehicles may exhibit an intermittent reduction in engine power, contain an active or stored DTC P1233 and/or exhibit a 'No Start' condition due to a cracked fuel pump filter housing.
