Q: What is the Coolant Temperature Indicator System and Coolant Temperature Sensor on Dodge Neon?
A: The coolant temperature indicator system includes a warning light or temperature gauge and a coolant temperature sending unit. The ECT sensor acts as an informational sensor for the PCM and the sending unit. If the light doesn't activate, the bulb could be faulty, the ignition switch might have issues, or there could be a circuit defect. Make sure the coolant mixture is correct.