Turbo solenoid valve: performance, service and price

The turbocharger solenoid valve is computer controlled. It controls the flow of air to the turbocharged engine. Powered by an electromagnetic coil and an air valve. This car part therefore it has pneumatic and electrical functions.

🚗 What is the turbocharger solenoid valve used for?

Le turbocharger your car increases the power of your engine by compressing the intake air. This is because the turbocharger maximizes and increases combustion efficiency in the engine by directing more air into the combustion chamber.

However, to control the air flow to the engine from the turbocharger, there is a solenoid valve controlled by the car computer.

Indeed, the turbocharger solenoid valve consists of a solenoid coil and an air valve, which are designed to control the amount of air supplied to the engine. Thus, the turbocharger solenoid valve has two functions:

• Pneumatic function : solenoid valve allows pneumatic control bypass turbo. The wastegate is a valve that limits the pressure of the exhaust gases on the turbocharger turbine. Thus, when a vacuum occurs in the circuit, the valve closes, which allows the turbocharging to be controlled. If the vacuum is accidentally removed, the wastegate opens and therefore stops the car's turbocharger.
• Electrical function : an electrical impulse is sent by the computer to the coil of the solenoid valve, which creates an electromagnetic field that activates or does not activate core, also called a drawer. Thus, the latter makes it possible to open or close the pneumatic circuit and control the bypass valve.

🔍 What are the symptoms of HS turbo solenoid valve?

There are several symptoms that can alert you to a pneumatic or electrical problem with the turbocharger solenoid valve.

Indeed, on a pneumatic level, it is possible that the core or box is no longer able to correctly operate the bypass valve. Then you will need to go to replacement solenoid valve.

Similarly, it is possible that hose punctured airway or bypass valve diaphragm causing air circuit failure.

Finally, the problem with the solenoid valve can also be due to a malfunction Vacuum pump preventing the creation of a vacuum of air. If you have any of these problems, your solenoid valve should be replaced as soon as possible.

Likewise, a malfunctioning solenoid valve can be electrical. Indeed, refusal can occur due to refusal wire harness or Sensors.

The problem can also arise from a lack of positive electrical power or from a computer that prevents the turbo engine from running. If you have any of these solenoid valve problems, you will need to quickly replace it.

🔧 How to check the turbocharger solenoid valve?

If your turbo solenoid valve is defective, it could be due to either a pneumatic issue or an electrical issue. In this guide, we explain how to determine the cause of the problem by testing your turbo solenoid valve.

Required material:

• Manometer
• Multimeter

Step 1: access to the solenoid valve

To access the solenoid valve, open the hood: the solenoid valve is located in the engine compartment. This is usually fairly easy to access. If you do not know exactly where the solenoid valve is, refer to your vehicle manual for all the information you need.

Step 2: check pneumatics operation

Start by checking the pneumatic function of the solenoid valve by connecting a vacuum gauge to the outlet of the vacuum pump. Start the engine and check that the vacuum reaches 0.98 bar in less than a second.

This vacuum must be maintained for several minutes after stopping the engine. If this is not the case, or if it takes more than a second to create a full vacuum, the solenoid valve is faulty and must be replaced.

Step 3. Perform electrical test.

If you don't notice any problem in the pneumatic test, then the problem is electrical. Connect a multimeter to the two terminals of the solenoid valve at the resistance measurement position. If the resistance value is infinite (equal to 1), this means that the solenoid valve has failed and must be replaced.

💰 How much does it cost to replace the turbocharger solenoid valve?

Replacing the turbocharger solenoid valve is a relatively inexpensive undertaking. Calculate the average 50€ for a new solenoid valve, depending on your vehicle model. Add to this the cost of labor, which on average is 60€, depending on the hourly pay in your garage.

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