P0125 Hyundai -

Question

code po125 on hyundai sonata tried changing senors thermostate coolant what eles can I do check engine lite still comes on

Answer 1

P0125 Insufficent coolant temperature for closed loop fuel control.ECT (engine coolant temperature) excessive for closed loop fuel control.

Check the connection when the temperature rises the ECT resisatance decreases if there is a intermitent connection the ECM sees a coolant temperature as cold . Here is a IAT that the terminal spreaded out and cause a IAT circuit high code condition.