Shop Engine Coolant Temperature Sensor & Sensor Location. View Coolant Temperature Gauge. Get Coolant Temp Sensors Replacement Cost. To ensure your vehicle's engine temperature is accurately monitored, regular maintenance of the Coolant Temperature Sending Switch is crucial. Signs such as erratic temperature readings or an overheating engine often signal it's time for a replacement. When selecting a new switch, consider the various types available, including single and dual sensor models, which offer robust material quality and specific features tailored to different vehicle needs. These switches play a pivotal role in managing engine performance, and proper installation is key, so opt for premium-grade switches with easy-to-follow instructions, enhancing both functionality and customer satisfaction in your online auto parts store.