I bought a 2000 luide yesteday & failed Emissions today. The MIL failed to light & bulb failed? Where is this connected? I tired to buy a chiltons manual & the parts store doesn't have one. I also reciceved these 2 codes. P1456 seems to be the gas cap from the post I,ve read. The P1259 I,m not sure about. Any help would be appreciated.