Possible causes – EGR solenoid valve harness is open or shorted– EGR solenoid valve circuit poor electrical connection– EGR volume control valve stuck closed– Dead (Weak) battery– Faulty EGR temperature sensor and circuit– Faulty EGR Valve– EGR passage clogged– Exhaust gas leaks Tech description EGR flow malfunction could be caused by a clogged EGR valve…