8 Warning Signs Your (ECT) Engine Coolant Temperature Sensor is Failing

A failing Engine Coolant Temperature (ECT) sensor can cause serious engine performance problems, leading to costly repairs if left unaddressed. This sensor plays a critical role in monitoring your engine’s temperature and helping your vehicle’s computer adjust fuel injection, ignition timing, and cooling system operations. Here are 8 signs that your ECT sensor might be failing: 1. Overheating Engine – If the sensor fails, it may not properly regulate the cooling system, causing the engine to overheat. 2. Poor Fuel Economy – A bad sensor may send incorrect temperature readings, leading to excess fuel consumption. 3. Check Engine Light – A failing ECT sensor can trigger the check engine light, indicating temperature-related issues. 4. Black Smoke from Exhaust – Incorrect fuel mixture due to false readings can cause excessive fuel to burn, leading to black smoke. 5. Rough Idling & Stalling – If the engine receives inaccurate temperature data, it may cause erratic idling or stalling. 6. Hard Cold Starts – The ECT sensor helps with cold starts; failure can result in difficulty starting in low temperatures. 7. Cooling Fans Not Working Properly – The sensor helps control cooling fans; a malfunction could lead to overheating. 8. Poor Engine Performance – Hesitation, misfires, or sluggish acceleration can result from incorrect temperature readings. Ignoring these warning signs can lead to severe engine damage. If you suspect your ECT sensor is failing, get it diagnosed and replaced as soon as possible. Watch the full video to learn how to identify and fix the issue before it becomes a major problem! 🚗💨 🔧 Subscribe for more car maintenance tips and troubleshooting guides! 🔧