More Videos...

1993 Honda Accord how to check for a bad water pum
How to check for a bad water pump

How to diagnose and repair an over heating problem on a Honda Civic
In this video I will show you how to diagnose and repair an over heating problem on a 1997 Honda Civic.The cooling fans stopped working I will show you how to check and repair the problem.I will also show you how to replace all the hoses and thermostat

Why is My Engine Coolant Temperature Sensor Bad? is the leading Honda Accord and Civic resource for technical DIY guides. If your ECT sensor does go bad, there are a few symptoms that will help you pinpoint the problem. For the full step-by-step article, please visit mperature-ect-sensor-bad-377260 Your Honda Civic's engine coolant temperature sensor is located in the front right section of your engine block. The engine control module uses this sensor to constantly measure the engine's temperature. It is then able to regulate the fuel levels and idling, so it can adjust the spark as well as the Exhaust gas regulation valve functions. This video will go over the specific symptoms of a bad ECT sensor and some options to repair it. Step 1 –Has Your MPG Declined? Because the ECT sensor plays a big part in how the engine coolant unit regulates temperature and fuel, you would likely notice a decrease in fuel mileage if the sensor has gone bad. Since lower fuel economy often does indicate that the ECT has gone bad, replace it with a new one and observe your car's fuel economy. If it is still lower than normal, the source of this issue may be caused by another faulty component of engine. Standard Honda Civic ECT sensors run from about $20 to $40. Replacing it yourself is a simple task, so you can avoid paying the professional cost. Step 2 –Is the Check Engine Light On? If the check engine light on your dash flips on, either pull the code with an OBD scan tool or do it manually. Engine code readers can run from $25 to $80 at your local auto parts store. You may not get a code that directly corresponds to the ECT sensor. But if the CEL code indicates a problem related to the sensor, the cheapest solution could still be to replace it. Step 3 –Are You Having Trouble Starting? Does your Civic have difficulty starting after you have just filled up on gas? If it does, specifically after the engine has warmed up to operating temperatures, this may also indicate that the ECT sensor is faulty. In addition, if you have to pump the gas pedal when cold-starting your car to keep it from dying, this may be another indication that your ECT sensor has gone bad. Another method is to observe the temperature gauge when the car has already started. The gauge needle should read a temperature just below the halfway point. If the gauge is reading too high or too low a temperature, consider replacing the ECT sensor. Step 4 – Is black smoke coming from the Exhaust? If you detect black smoke, this is also a sign that you should replace your car's ECT sensor. If the engine control module of your car is not receiving the correct temperature reading, it may adjust other components of the engine. This causes them to run under abnormal settings, and causes a change in fuel mixture or even a complication within the engine block. If your car has presented any of these symptoms, it is very likely that they are related to a bad ECT sensor. Replacing the sensor is an easy, inexpensive, quick repair, and could save you from costly engine damage in the future. Hopefully you’ve been able to pinpoint the source of the faulty temperature sensor. Once you repair it, you’ll gain back proper fuel levels and proper idling.

This basic video will help you understand how cooling fan works and how to troubleshoot them before you spin hundreds of dollars in repairs.