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Had the same problem wiht my cougar. in some cases it is a faulty sensor. The sensor is really easy to replace and only costs like 15 dollars from any Ford dealership. Also you must fill the coolant past the recommended full mark. I replaced my sensor and still had problems, but when i filled the resivore up slightly past the "hot" fill mark i have never had problems wiht it since

ALSO WHEN THE ENGINE IS COLD THE COOLANT LEVEL IS ALWAYS LOWER THAN HOT. MIGHT WANT TO TAKE THE CAP OFF AND LOOK IN RADIATIOR WHILE COLD, MAY JUST BE A LITTLE LOW OF COOLANT. ANOTHER WORK AROUND WOULD BE TO UNPLUG WIRES TO SENSOR AND PUT A JUMPER WIRE BETWEEN THE TWO AND DISABLE THE PROBLEM.

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โˆ™ 2011-09-13 17:23:54
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Q: Why would the low coolant light on a 2000 Cougar come on especially in the morning or going up a hill?
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