i'm getting a obd1 code reading 43 . fuel system problem. my car is running fine . i reset the car and still the engine lights up after a few miles on the high way. i'm getting nomal pressure on my fuel . is this a big problem that's going to pop later on . what could be the case that making the engine light up and read code 43 ?

 

You stated your car runs fine so your fuel system is fine, the next step is to check your O2 sensor, you may have a prolem there. I have attached something to help you out.