Feuling Parts Head Temperature Sensor - HD728676553 Product Description Electronic engine management sensor found on the cylinder head Measures the temperature of the cylinder head Data is then sent to the ECU to calculate timing and fuel ratio for the engine Like all sensors, they can fail over time and this may cause long cranking time,decrease in power, acceleration and fuel economy If your engine light is on, have the code scanned you may have a faulty cylinder head temp sensor Made in