TECHNICAL SERVICE BULLETIN: CYLINDER HEAD REPLACEMENT FOR LEAN MISFIRE - This bulletin has been revised to include additional information. This bulletin provides the procedure to replace the engine cylinder head on some 2017-2019MY Niro (DE HEV/PHEV) vehicles produced from January 1, 2016 through November 13, 2018 These vehicles may exhibit a MIL with misfire DTC's and/or experience a slight engine hesitation at the speeds between 24 - 37 MPH due to Exhaust Gas Recirculation (EGR) operation.
