CUSTOMER CONCERN After engine replacement, the vehicle will not enter READY mode and stores DTCs P0A09, P0A0D, and U0110. CAUSE An inverter-with-converter electrical connector was not fully seated after the engine service, opening the high-voltage interlock and converter communication circuits. CORRECTION Fully seat and lock the inverter-with-converter connector, clear DTCs P0A09, P0A0D, and U0110, and verify READY mode, converter communication, and hybrid-system operation.