Low coolant or bad sensor
The coolant temperature sensor on a 2001 Jeep Cherokee is located in the intake manifold. It monitors the flow and temperature of coolant through the engine.
Detach the wire and unscrew the sensor.
The light is not a coolant light, it is a temperature light which comes on when the temperature of the coolant is above the limits. In other words you engine is overheating. Can be defective thermostat, bad water pump, clogged radiator, or blown head gasket.
check/replace the engine coolant level sensor located in the engine coolant overflow reservior (located at the rear of the engine compartment pass. side)
Bad coolant sensor or faulty wiring to the sensor.
Coolant is low or a sensor malfunction.
No, the electric cooling fans turn on and off by a signal from the coolant temp sensor. The coolant level sensor only illuminates the low coolant light when you are low on coolant.
Coolant level low or level sensor malfunction.Coolant level low or level sensor malfunction.
the sensor could be dirty. clean off the accumulated crud with a toothbrush and if the low coolant light still remains on then the sensor will need to be replaced.
There is a coolant level sensor in the bottom of the coolant tank. If the tank has enough coolant, then the sensor is bad. You can buy a new tank for about $50 (Rockauto.com or Autozone) and replace it in an hour or so. Or just disconnect the cable from the sensor and check your coolant level on a regular basis.
Low coolant in coolant recovery tank or radiator or defective sensor
Either your coolant is actually low or you have a coolant sensor bad.
The engine coolant temperature sensor has nothing to do with the low coolant light. The low coolant sensor is mounted in the bottom of the overflow/filling reservoir by your washer fluid bottle. You will need to verify that the coolant overflow/fill bottle has coolant in it and if it does then the sensor is bad and will have to be replaced.
Add coolant to the reservoir. If the low coolant light still stays on, replace the low coolant sensor.
Make sure it really is low on coolant by checking the coolant when engine is off. If the level is up to par, then the sensor may be bad.
Low coolant or a defective sensor