P0657 Hyundai Actuator Supply Voltage A Circuit Open
Possible causes
– Faulty Engine Control Module (ECM)
– ECM harness is open or shorted
– ECM circuit poor electrical connection
– ECM Programming
– ECM harness is open or shorted
– ECM circuit poor electrical connection
– ECM Programming
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0657 Hyundai Description
The Transmission Control Moduel (TCM) has detected a voltage supply fault to the hydraulic control unit
Hyundai Vehicle:Hyundai Sonata,Hyundai Elantra,Hyundai Tucson,Hyundai Veloster,Hyundai Accent,Hyundai Getz,Hyundai Genesis,Hyundai Veracruz