Shortly after starting the car, the electric fan kicks on. It runs continuously regardless of engine temperature, outside temp, or the air conditioning being on. I checked to see if the air conditioner compressor was always running, but it was not. Any ideas what could cause this? Thanks for your help.
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This is a normal condition for this model and many more. There maybe an issue with your engine oil or coolant systems. If you can flush the radiator & coolant system clean on next service & replace with a fresh quality brand of new coolant then you may have solved some of the problem. The other is if your rad fans are kicking in enough or at all. So do a stationary check in your garage. let the engine warm up on idle. Then when it reaches a heat that will kick in the fans check what the Temp-gauge is reading & make a note.
You may have a weak oil pump or water pump. Check the pumps records & see if they are newish or first day. Water circulation is very important in a cars system. So in slow traffic the engine is running at low rev's & gets hot due to slow air speed through the rad. So the water pump is there to keep the pressure up at all times. It could be the No:- problem with your car.
After that get an engine oil pressure test done & compare with the results data spec-sheets from its manual.
I would try another place for the code check. If the check engine light is on there are trouble codes stored in the computer. It could be a wiring harness problem or any number of electrical components, including injectors.
It could be more than one problem. The cooling fan could be running because the temp sensor is sending the wrong signal to the computer. The ac compressor or clutch could be bad causing a heavy load on the belt and the engine. I would unplug the compressor clutch and see if the engine still bogs down with the ac engaged.