ok my check engine light came on so i went to advance and got it scaned. the code they pulled was p1641 fc relay 1 contol circuit mil requsted. i also noticed that my fuel pressure is on 65 instead of 38.is the fuel pressure related to the code and if so how do i fix it? thanks joe
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The PCM can not measure or alter fuel pressure. There are no codes for fuel pressure. The problem is not related in any way to the code.

P1641 is for the primary cooling fan relay circuit.

 

so i guess i need a new pressure regulator?

 

...or a new fuel pressure gauge.

Just curious.... do you have an AFPR, and if so, what brand.