so out of no where on my way home tonight i get a code 43. fuel supply system. is that tellin me my fuel pump is takin a ---- or something??

runs fine was just wondering what would prompt my car to throw that code.

 

fuel pump
fuel filter
fuel rail
injectors
fuel lines
fpr

could be anyting doing with any part of your fuel system, not trying to be a smart ***, but seriously, people get that code for all of the above reasons. more than likely your pump/filter/or injectors are taking a ---- on you.

 

some1 correct me if i am wrong. But the ECU would throw that code based on a lean o2 reading right? if the ecu has to constantly compensate for a lean condition it'll throw code 43?

 

na, that usually triggers code 45, 'fuel system too rich or lean'. usually 43 pertains to something having to do with the actual delivery of the fuel.

 

good question, that's why it's a bitch of a code. the only thing 'electrical' even in the fuel supply system is the pump and injectors, however, i've heard of people getting the code and trying different injectors, pumps, etc., and it not being solved until they replaced the filter or some off the wall ----.

 

man thats harsh.

 

i`ve had the same code and it only comes up when ever i floor it at about 4500 rpm.
, i changed the filter/new 255 pump, used fuel system cleaner an nothing helps, it turns out a universal O2 from rice boy fixed it.
everyone over HT is like change this and change that before touching O2 sensor, but figure once you had it doen it will last another 10K miles or so, i`d do the O2 first.

 

this code sux.. why, Cuz at WOT the o2 is ignored

 

well i reset the ecu, and have been driving all day and no more code, prob a hiccup or some ----.