Code 43: Fuel Supply System

DA9vid

**Former** Civic Owner
My car's CEL came on today while I was warming it up and it said code 43 (4 long pauses and 3 short ones). What exactly does this code mean? Is it the fuel pump, dirty fuel filter, of fuel injectors? Why would it come on if I just warming it up? I have not had any problems with bogging or stuttering. Any help would be appreciated.
 
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