DTC P1404: Exhaust Gas RECIRCULATION Closed Valve: Notes
WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport and 2002 Isuzu Rodeo. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If EGR valve shows signs of excessive heat, check exhaust system for restriction or blockage (possible plugged catalytic converter).