Defective intake air temperature (IAT) sensor.Malfunctioning coolant temperature (ECT) sensor.Defective cooling fan (doesn’t turn off).However, there are other possible conditions you should consider. This part is needed to control engine temperature. The most common cause of the P0128 trouble code is a stuck open thermostat. Motor temperature drops down while driving at high speeds.Engine takes longer to reach normal operating temperature.Engine doesn’t reach normal operating temperature.Here are the most frequent symptoms occurring with P0128: There aren’t many symptoms that this condition will cause, making it simple to pinpoint the problem. The most common symptom with the P0128 trouble code is the inability to get the engine temperature up to normal operating specifications. It also looks at the speed of the vehicle, the engine coolant temperature (ECT) sensor and the intake air temperature (IAT) sensor reading. To determine if the engine has reached normal operating temperatures, the ECM examines the length of time that the vehicle is running. The Engine Control Module (ECM) is responsible for monitoring the ambient temperature and determining if it is in line with manufacturer specifications. P0128 – Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What Does the P0128 Code Mean?Ĭode P0128 indicates that the engine coolant hasn’t gotten hot enough in the appropriate timeframe. Mechanics Tips about the P0128 Code Code Definition
0 Comments
Leave a Reply. |