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What does 'Audi coolant pump 2 open circuit' mean?

1 Answers

McMadison

07/29/25 5:28pm

Audi coolant pump 2 open circuit means there is a fault with a coolant pump that needs to be checked or replaced. Coolant pump 2 is an auxiliary water pump located not far from the main water pump, used for continuous heat dissipation after the car is turned off. Check the wiring harness and the small water pump. It is necessary to go to a 4S shop for inspection and repair. Below is additional information: Wiring harness: The wiring harness is directly connected to the engine computer via a plug without a fuse. The water pump of this car is installed under the intake pipe. The interface between the engine and transmission is located below the intake pipe. Replacing the water pump requires removing the intake pipe. Coolant: Coolant is an indispensable part of a car engine. It circulates in the engine cooling system, carrying away excess heat generated during engine operation, allowing the engine to operate at normal working temperature. When the coolant is insufficient, it will cause the engine water temperature to be too high, leading to damage to engine components. Therefore, once the owner finds that the coolant is insufficient, it should be added in time.

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