I Am Having A 1443 Code That Will Not Go Away!!! I Have Changed The Purge Valve And The Sensor(thermistor) The Dpfe And The Egr Regulator Valve(?) I Have Forgotten The Name Of It I Think. At Any Rate I Don't Think Anythink Is Left To Replace. My Question Is--is It Possible That The Seal On The Tank Where The Pump And Float Go In Being Less Than Perfect Is Causing This??