Question about 2005 Nissan Pathfinder
This issue may be due to a restricted radiator. The engine heats up but can not flow through the radiator fast enough and pushes the coolant into the overflow until it runs over. Then the engine draws coolant back in showing a low condition.
My suggestion is to check the radiator with an electronic tool for checking temperature. If the temperature is 180 - 200 on the upper hose and 75 - 95 on the lower hose then the radiator needs to be replaced.
A faulty thermostat (stuck open) would not heat up.
A faulty thermostat (stuck closed) would not cool down, but would push coolant out of the overflow tank.
If the vehicle has white smoke (actually steam) coming from the tail pipe, then you most likely have a blown head gasket.
Posted on Dec 11, 2009
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Posted on Jan 02, 2017
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