i know what the code is but what exactly does this meen what do i have to replace?

 

90% of the time its the o2 sensor.
other wise get a new fuel filter

 

I would try fuel filter first.....the o2 sensor has its own code.....I believe its either 1 or 2......

 

oh word ya i have a bad o2 i already new that but i didnt know thats what would be making that come on thanks guys.

 

Yes the o2 sensor has its own code.

but u also gotta think of the other aspect. what happens when a o2 goes bad? you run a little richer and that will seem awkward to teh ECU so it will trip a fuel system code.

 

so ya pretty sure its my o2 but i am broke and need to test it to be 100% ive done my research but am electronicly retarded and cant figure out what back probing is. If someone could explain how to test a o2 with a multi meter for dummies i would be greatly in debt. working with a 93 ls i converted to obd0 if that makes a diff

 

Besides code 43, what are the symptoms?

Depending on symptoms, code 43 can indicate a bad O2 sensor or a fuel system problem.