Sounds like those dumbasses broke a sensor.
On my 3S-FE theres 2 sensors, one for the temp guage itself and another one (ect - engine coolant temp) that goes to the ecu.
I'm not sure if theres 2 sensors on a 5S-FE, but there is a ect (engine coolant temp) for sure.
On my 3S-FE theres 2 sensors, one for the temp guage itself and another one (ect - engine coolant temp) that goes to the ecu.
I'm not sure if theres 2 sensors on a 5S-FE, but there is a ect (engine coolant temp) for sure.