My 2004 LS 430 is throwing a P0001 code, fuel pressure regulator, yet the car runs fine, just finished a 600 mile trip with no problems. Could the code mean something else is wrong? Is this something to be worried about? The car has 136,000 miles on it and has been well serviced during its entire life.

 

I'm guessing you aren't using Techstream, since there shouldn't be a P0001 on the 2004 LS430. Can you try another scanner, preferably Techstream, to confirm the code?