On my hatchback its throwing a code #43 which is FUEL SUPPLY SYSTEM and i was wonder where should i start or should i just change the o2 senor ??? any suggestions ???

 

Does the car start and run?

 

yes the car starts and runs fine just when i go on the freeway the light comes on and its throwing #43 code and i dont know where to start

 

When's the last time you replaced your O2s?

 

i never changed the o2 senor ever since i got the swap in the car for about a year

 

at the samettime i was changing the master cylinder on the car i also clean the IACV and FICV and on the IACV there is a senor there but i replaced it with my friends IACV then reset the ECU and still the check engine light comes on.