If your Ford vehicle is displaying the P0125 error code, there are two practical solutions you can try to fix it at home. The P0125 error code indicates that the engine control module is not detecting enough heat in the cooling system before the fuel management system can take control. Here are the steps to resolve this issue:
Method A: ECT Sensor
In most cars, the primary engine coolant temperature (ECT) sensor is installed near the thermostat in the cylinder head. Start by removing the ECT sensor from the engine and use a multimeter to test it. At an ambient temperature of 68 degrees Fahrenheit, the sensor’s resistance should range between 2000 ohms to 3000 ohms. If there is no reading, it indicates that the ECT sensor is faulty and needs replacement.
Method B: Thermostat
The thermostat is typically located near the water pump on the cylinder head. Carefully remove the thermostat from the engine and install a new one in its place. Ensure proper installation by positioning the short end toward the hose and the deep end towards the engine. Additionally, make sure the jiggle valve is pointed straight up to allow air to pass through the system.
After completing the repair, use a code scanner to clear the error code and rescan the vehicle to ensure that the issue has been resolved.
For more information and to claim a free engine code scanner, you can refer to the video link in the description below. Feel free to leave any questions in the comments, and our team of mechanic professionals will be happy to assist you.
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