
When a car's temperature gauge fails to display, it could be due to reasons such as poor contact in the instrument panel's main wiring harness connector. Below are specific details about why a car's temperature gauge might not show a reading: 1. Specific Causes: The power wire to the temperature gauge is broken. The heating coil in the temperature gauge is burnt out. The heating coil in the temperature gauge sensor is burnt out or the contacts have poor connection. The wiring to the temperature gauge sensor is poorly connected or broken. 2. Solutions: Inspect the temperature gauge. Check the wiring, and verify whether the connectors have poor contact. Examine the temperature sensor. Check if the temperature sensor is damaged and whether its connectors have poor contact. Then, open the radiator cap to see if the water inside is not hot. If the water temperature is low, consider issues with the radiator. If the water temperature is normal, consider a sensor malfunction.


