Hey all. New to EOC. I really like this thing (2006), but I'm having O2 sensor issues. Had it at the dealer and they said it was the pre cat sensor so I replaced it with an aftermarket Bosch. I've been getting better gas mileage since by 5 mph, but the engine light is still on. Checked the code today with a friend and now it's throwing a code of P1157. Tried to clear it, but the light came back on immediately. I'm wondering how to procede. Will a genuine Honda part fix it and if so where's the cheapest place to get it? What will happen if I do nothing? Don't really care if the light is on, but don't want to do any damage either or cost myself more in the long run.