At higher mileages (125,00+) the Engine Coolant Temperature Sensor may intermittently stop working, especially when the vehicle is fully warmed up. This can result in illumination of the Check Engine Light and/or an engine stalling problem.
Car Problem Reports
Toyota T100 Engine Coolant Temperature Sensor May Stop Working at Higher Mileages
Toyota T100 Problem
Engines Affected: 2.7L 4 Cylinder, 3.4L V6