Question about 1997 Jeep Grand Cherokee
The 'coolant sensor bad' message flashes on the lcd panel. Where do you check sensor connection, to see if loose or what?
The coolant temperature sensor is most commonly located near the thermostat housing. It will have 2 wires connecting it. Don't confuse this sensor with the coolant temp sending unit that controls your gauge temp, which generally has 1 wire connecting to it. Removal and replacement of the coolant temp sensor is fairly simple and best of all, it's cheap. You'll pay maybe $15-$20 for it and I would HIGHLY recommend replacing it! It is arguably the most important sensor on your vehicle, as it tells the computer how rich/lean to run the engine based on its temperature. As it ages, the thermistor inside the sensor can tend to run out of calibration and may cause the computer to think the engine is much warmer or cooler than it really is. This can lead to hard starting, rough operation, overly rich/lean fuel mixture, etc.
I hope this helps! Please let me know if I can be of further assistance in this matter. :)
Posted on Nov 14, 2009
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Posted on Jan 02, 2017
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