Q: What is causing my car to overheat?

asked by on July 14, 2016

My car overheats when I'm driving but the temperature gauge goes up and down. I'm live in new Mexico, exactly at bernalillo and we been having very hot heatwaves. I already changed water pump, radiator cap, and thermostat, and heat sensor. I just change a hose that goes to the engine because it had a rupture. Also I check the engine oil and is low, I can say that the engine oil is my fault but my question is what could be causing that? Note : the fan works fine.

My car has 136000 miles.
My car has an automatic transmission.

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