Chevrolet P0128-00: Understanding and Tackling ECT Sensor and Thermostat Issues

If your Chevrolet is displaying a P0128 error code, this video is here to help. We will provide you with two practical solutions to fix the error code at home.

First, use the Zeus app to scan your vehicle and see the error code P0128. This code indicates that the engine has not reached the required temperature level within a specified amount of time, as detected by the powertrain control module.

Method A: ECT Sensor

In most cars, the primary ECT sensor is installed near the thermostat in the cylinder head. Remove the ECT sensor from the engine and use a multimeter to test it. At an ambient temperature of 68 degrees Fahrenheit, the sensor resistance should be between 2000 ohms to 3000 ohms. If you do not get a reading, this indicates that the ECT sensor is faulty and needs to be replaced.

Method B: Thermostat

In most cars, the thermostat is placed near the water pump on the cylinder head. Carefully remove the thermostat from the engine, ensure the engine is cooled before starting the process. Install a new thermostat with the short end toward the hose and the deep end towards the engine. When reinstalling, make sure the jiggle valve is pointed straight up to the top of the engine to allow air to pass through the system.

After the repair, use the Zeus app to clear the error code and rescan to ensure everything is functioning correctly. You can also claim a free engine code scanner at the link in the description for more savings on car expenses.

Feel free to leave comments, our mechanic professionals are here to answer your questions. Thank you for watching!

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