Component Inspection

Engine Control

P0128 Coolant Thermostat (Coolant Temperature below Thermostat Regulating Temperature) - Component Inspection

Component Inspection

1. Remove the thermostat and check the following items:.
(1) Stuck or damaged
(2) Verify the temperature at which the valve is open
- Valve opening temperature : 82 °C (177 °F)
- Full opening temperature : 95 °C (205 °F)
2. Is the thermostat normal?