ok so i figured ide scan my car just to be sure and i guess when i cleaned the maf egr and pcv it must of shut off the code cus the only thing i got this time was p0442 and another for traction control but i still am only getting like 15-16 mpg and my power is slacking but ill try the plugs wires and filter. what could cause the p0442 besides gas cap? im guessing hole in step or something or evap canister