P0403 code in a Mitsubishi eclipse?? EGR Valve.?

if you did not erase the code you will still have the code until the comp goes through its start , heat up to operating temp, run cycle , it can be up to 10 times until it clears. Does your egr have the electrical circuit common to it. Allot of egr systems have seperate solenoid that goes bad that your unaware of.