Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
¿Qué significa esto?
Code P0128 indicates the engine coolant temperature has not reached the thermostat's regulating temperature within a specified time after starting.
Aviso legal: Este código de diagnóstico forma parte del sistema OBD2 estándar y puede aplicarse a los modelos Mclaren Artura fabricados de 1996 a 2026. Sin embargo, tenga en cuenta que la presencia de este código específico depende de la configuración del motor de su vehículo, las opciones y el año de producción.
Causas comunes
Termostato defectuoso o atascado
Sensor de temperatura del refrigerante (ECT) defectuoso
Fuga de refrigerante o nivel bajo
Síntomas a tener en cuenta
- La luz de Check Engine está encendida
- Disminución del rendimiento de combustible
- El motor se apaga cuando está frío
- Luz de advertencia de temperatura del refrigerante encendida
Cómo Diagnosticar
Soluciones Comunes
Replace the Engine Coolant Thermostat: This is the most frequent cause of a P0128 code. The thermostat is likely stuck in the open position, allowing coolant to continuously circulate through the radiator, preventing the engine from reaching its optimal operating temperature. Ensure to use an OEM or high-quality aftermarket thermostat with the correct temperature rating for your specific vehicle.
Replace the Engine Coolant Temperature (ECT) Sensor: If the ECT sensor is providing an inaccurate, consistently low temperature reading to the Powertrain Control Module (PCM), the PCM will incorrectly believe the engine is too cold and trigger P0128, even if the engine is at proper operating temperature. This is less common than a faulty thermostat but a definite possibility.
Flush and Refill Cooling System: If the coolant level was low, or the coolant is old, contaminated, or has an incorrect mix ratio, a proper flush and refill with the correct type and concentration of coolant can resolve issues related to poor heat transfer or air pockets within the system. Ensure proper bleeding of air from the system after refilling.