I drive 07 328i. A week ago, I have replaced thermostat and water pump and everything was okay. A day after, I started the engine and drove the car and felt car did not have enough power even though I hit about 1/2 or 3/4 of gas. Also, When I change the gearManual car and hit the gas, there is delay of car reactionwas reacted right away. I stopped the car and heard radiator fan was spinning crazy. I put the car back on drive way and turned off the engine and turned it on again. I heard radiator fan still spins crazy. Could it be temperature sensor located in cylinder head or lower radiator?
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