ok.. i have a 99 civic hx ... check engine light is on ... i had it read.. says that it's a "fuel x x " sensor x= 2 other words ............... i asked autozone what is it? they said they did not know.. i had it checked at discount auto parts.... same code.... they said they did not know... i am going to HT for the answer.. if not... honda dealership to get screwed to get the the car check engine light off..... CAR runs fine!....