P1640 KIA – Main Relay Malfunction

P1640 KIA Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1640 KIA Possible Causes

Faulty Main Relay,Main Relay harness is open or shorted,Main Relay circuit poor electrical connection

P1640 KIA Description

Main Relay Malfunction is the generic description for the P1640 Kia code, but the manufacturer may have a different description. Currently we have no further information abouth the P1640 Kia OBDII code.