DTC P1404: EGR Closed Valve: Notes
WARNING: This page is about a different car, the 2000 Isuzu Rodeo and 2000 Isuzu Amigo. 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 the exhaust system for restriction or blockage (possible plugged catalytic converter).
NOTE:
Use illustration for circuit reference. See Figure.