Possible causes EGRVR circuit open. VPWR open to EGRVR solenoid. EGRVR circuit short to VPWR or GND. Damaged EGRVR solenoid. Damaged PCM. Tech notes The EGR vacuum regulator solenoid resistance is between 26 and 40 ohms. Symptoms – Engine Light
FORD Technical Service Bulletins for P1409 code 2002 FORD EXPLORER UNKNOWN OR OTHER
FORD Technical Service Bulletins for P1409 code 2002 FORD EXPLORER UNKNOWN OR OTHER
P1409 BUICK – EGR Vacuum System Leak
P1409 CADILLAC – EGR Vacuum System Leak
P1409 CHEVROLET – EGR Vacuum System Leak
P1409 DODGE – Misfire Adaptive Numerator at Limit
P1409 GMC – EGR Vacuum System Leak