Low Coolant light is on but coolant levels are OK. Is this a themostat problem or temperaturre sensor? Please advise as to cost to repair.

Asked by Aug 12, 2013 at 11:44 AM about the 1995 Mercury Cougar 2 Dr XR7 Coupe

Question type: Maintenance & Repair

Just purchased used 95 Cougar with 100,700 miles. Garage kept. Very clean.
Besides low coolant light, car has left front side vibration starting at approx. 30-35 mph.
Passed New Jersey emissions inspection.

3 Answers

26,275

The low coolant light is from either low coolant level in the reservoir or a defective sensor in the reservoir bottle. Sounds like a speed-sensitive vibration - probably tire balance but could be a bad tire.

2 of 2 people found this helpful.
72,455

For testing purposes unplug the low coolant sensor. If the light still is on you have a short in the wiring. If it goes out either the sensor is bad or, if the radiator or recovery tank has been replaced, somebody forgot to drill out the template hole(s) for the sensor. If this is the case the sensor is dry and "thinks" you're low on coolant. HTH. -Jim

4 of 4 people found this helpful.

Could the light come on if a fan stops working and what if it goes off for like a houer and comes back on

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