[dark-knight]

i tried doings some research, but couldnt find a straight accurate answer. i gotta pick my son up in panama city in 2 days and dont wanna drive the mach with problems..... my Mach threw a SES light, so i check the codes with my diablo tuner. codes came as :
P0138-o2 sensor high voltage, bank 1, sensor 2

P2271 o2 sensor signal stuck rich bank 1, sensor 2

clearly somethings up with that sensor. one thing im tryin to find out is. Which sensor is this? and what could cause this, Im just gonna buy a new one and replace it. thanks fellas