Alright im havinga slight problem here. My car is launching those two codes on me but not acting up. Im gonna change the knock sensor as to hopefully do away with the 43. Is this possible why im getting the code 44 as well. 44 is the lean exhaust code. Or should i switch to a higher grade gas. Currently us 89 grade, dont really wanna pay the the difference but if it helps the car then yeah ill do. also changing o2 sensor as well as MAP sensor. Any information would be great thanks guys.