during a bout of spirited driving out in the country earlier today, my service engine light comes on. no drivability problems. i take it to autozone and they pull 0136 bank 2 sensor 1. i have a dr gas o/r x w/ MILs. the car has 42k. i did a search and it seemed that everyone else with code 136 had bank 1 sensor 2. what should i do? will it hurt to drive it in the meantime? thanks.