P0128 Definition: Coolant Temp – Below Thermostat Regulating Temp Here’s a video that shows how to do so on a 2014 model: Replacing the thermostat is the fix most of the time with the Durango. Thermostat stuck open, Engine Coolant Temp Sensor (ECT) issues Lack of heat, MIL (check engine light), MPG Loss (1 or 2 tops) P0128: Coolant Temperature – Below Thermostat Regulating Temp P0128 is most often caused by a thermostat that is stuck open. In this article, we’ll explore the possible causes of the Dodge Durango P0128 OBD II trouble code and some possible solutions. It’s essential to address this issue immediately, as vehicles with this issue have increased emissions and decreased fuel efficiency. This code can appear as soon as you start your vehicle, or it can also occur while driving. The more the input readings, the better the output decisions are.The P0128 OBD II trouble code indicates that your Dodge Durango’s engine coolant temperature has not reached its required operating temperature within a certain amount of time after starting the vehicle. ![]() One ECT sensor might not be as much reliable to operate the fan efficiently. ![]() This secondary ECT Sensor works together with the primary ECT Sensor to optimize the working of the car and give an accurate reading of the coolant to the car ECU before it is heated up, saving it from potential overheating problems.Īdding an ECT sensor is another way to get a more accurate reading. To keep the radiator of the engine working properly and to regulate the temperature of the engine constantly, locating these leakages is also very important. However, the one location where the secondary ECT Sensor is seldom placed in the radiator is the outlet of the radiator tank or pipe as it is the most common place for leakage of the engine coolant fluid. The location of this sensor is not very common and is found in different locations in different cars. The other Engine Coolant Temperature Sensor is known as the secondary ECT sensor or the ECT sensor 2. This cylinder head closes the top opening of the cylinders and packs it into a casing forming a combustion chamber for the fuel and air to mix and react. In an internal combustion car’s engine, the cylinder head is placed on the top of the car’s cylinders above the cylinder block. This sensor is located on the coolant passage next to or in the thermostat housing of the cylinder block or cylinder head. The main Engine Coolant Temperature Sensor is known as the primary ECT sensor or ECT sensor 1. One sensor is located near the thermostat valve housing, and the second one is located in the radiator outlet tank or pipe. The pair sensors can be installed in different places, depending on the make, model, and year. ![]() Most of the cars that are being used nowadays contain pairs of Engine Coolant Temperature (ECT) Sensors for the purpose of sending accurate and precise information to the car ECU. These sensors are directly connected to the car ECU for measuring the temperature of the engine coolant. ![]() This sensor consists of wires ranging from 1 to 4. But modern cars, have coolant temperature sensors placed next to the thermostat housing, which is directly connected to the car ECU.
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