P0402 MAZDA Exhaust Gas Recirculation Flow Excessive Detected

Possible causes – EGR volume control valve stuck open– Faulty EGR volume control valve– EGR solenoid valve harness is open or shorted– EGR solenoid valve circuit poor electrical connection– Faulty EGR temperature sensor and circuit When is the obd code mean? High Exhaust Gas Recirculation (EGR) flow control is detected Symptoms – Engine Light ON…