I've been getting a code 43 "fuel supply system"for a while every now and then. Head gasket, water pump, piston rings are new. I dont know why Im running rich suddenly. On this other forum online, one person said most of the time a code 43 is a bad 02 sensor. Im using a 4 wire with a P28 ecu. Has anyone else had this problem? I dont know what to do. I replaced the fuel filter about a month ago. I want to change the fuel pump soon. My car is stock except for the cold air intake and ebay header.

Heres a video too: http://www.youtube.com/watch?v=AUrIkdf5iIc


Modified by atarigamer01 at 11:54 AM 9/18/2008

 

just change the 02 sensor and u will be good to go

 

yep...replace your 02 sensor and u'll be set

 

ok guys and girls
i have a code 43
and insted of creating a new thread i figured i would ask here

so my code...
like the op it only happens sometimes
unlike the op i heve rewired my ecu (car was stolen and cut the ecu out)
so i have spliced a new ecu plug into my cut harness
car runs great even with the code
so the question

how can i test the o2 sensor to see if it's the problem?
the o2 wires are shilded so by me splicing could that cause the problem?

sorry if the format is all fudged up But i'm on my phone