Freeze plug at the rear of the motor. Between the transmission and the motor.
Yes.
Bad water pump, the seal is gone. Get a new water pump.
Bottom of radiator.
Yep. Might even cause the engine to stop running forever when it overheats and seizes up. Your engine loves you and wants you to stop asking questions and fix the coolant system. Something is causing you to have low coolant levels and you need to figure out why. Take it to a reputable shop for diagnosis.
On the coolant overflow bottle that in on the passenger side of the engine.
coolant leaking into the engine
P1281 means the engine coolant temperature remains below normal during operation. Could be the thermostat.
It could be but most likely the engine is overheating. Could also be that the cap is not holding pressure and needs to be replaced.
There are several reasons a 2002 Jeep Liberty could overheat. Some possible reasons are low in coolant, a bad thermostat, or the head gasket went bad.
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.
IN THE WATER JACKET.
The "Coolant Sensor", for the ECU, is right next to the water neck at the front of the engine. the "Coolant sender", for the temperature guage, should be on the back of the head at the rear of the engine!