01-001-26a

Some customers may experience a check engine light ON with DTC P0126:00 (Thermostat stuck open) and one or more of the following symptoms: Engine takes longer to warm up.
• Engine temperature gauge fluctuates.
• Low coolant temperature indicator (blue) light stays on longer or turns on while driving.
• Poor heater performance, especially at idle.
• This concern may be caused if the coolant control valve fail-safe thermostat opens at a temperature lower than the normal temperature due to a deformation of the thermostat diaphragm. To eliminate the concern, the water flow control valve specification has been modified.