2003 Lancer es P0401 code
 

I have changed all the solenoids, the EGR , hoses, and taken off my intake and cleaned it out. I put all new gaskets when I reassembled it, but I can't get rid of this code.

Why don't you go to Autozone and ask them to read the code? They will do it for free

Code
 

I work at Advance Auto Parts and also have a code reader. I know what the code is, but thank you for the advice.