P0250 Turbocharger Wastegate Solenoid B Low

Turbocharger Wastegate Solenoid B Low: Causes, Symptoms, and Fixes

If you own a vehicle with a turbocharged engine, you may have heard about the wastegate solenoid. This small but crucial part is responsible for regulating the turbo boost pressure, ensuring optimal engine performance. When the wastegate solenoid B malfunctions, it can cause a range of issues, from reduced power and acceleration to engine stalling and even damage. In this article, we will discuss the causes, symptoms, and fixes of the P0250 code, which indicates a problem with the turbocharger wastegate solenoid B low.

Causes of P0250 Code

The P0250 code is triggered when the Engine Control Module (ECM) detects that the wastegate solenoid B voltage is below the expected range. This can be caused by various factors, including:

  1. Wiring issues: A damaged or corroded wire, loose connection, or a blown fuse can prevent the wastegate solenoid B from receiving proper voltage, causing the P0250 code.
  2. Faulty solenoid: The wastegate solenoid B can fail due to wear and tear, exposure to heat and vibration, or contamination from dirt or debris.
  3. Failed ECM: In rare cases, a malfunctioning ECM can send incorrect signals to the wastegate solenoid B, causing it to malfunction and trigger the P0250 code.

Symptoms of P0250 Code

The P0250 code can cause various symptoms, depending on the severity and duration of the problem. Some common symptoms include:

  1. Reduced power and acceleration: When the wastegate solenoid B is not functioning correctly, the turbocharger cannot regulate the boost pressure, causing a loss of power and acceleration.
  2. Engine stalling: In severe cases, the P0250 code can cause the engine to stall or shut off completely, making it difficult to restart.
  3. Check Engine Light: The P0250 code triggers the Check Engine Light to come on, indicating that there is a problem with the wastegate solenoid B.

Fixes for P0250 Code

If you experience any of the symptoms of the P0250 code, it’s essential to diagnose and repair the problem as soon as possible to avoid engine damage or safety hazards. Here are some common fixes for the P0250 code:

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  1. Check the wiring: Start by inspecting the wiring and connections to the wastegate solenoid B. Look for signs of damage, corrosion, or loose connections, and repair or replace as needed.
  2. Replace the solenoid: If the wiring is not the issue, the wastegate solenoid B may need to be replaced. This is a relatively simple process that involves removing the old solenoid and installing a new one.
  3. Replace the ECM: If none of the above fixes solve the problem, it’s possible that the ECM is malfunctioning. In this case, you may need to replace the ECM or have it reprogrammed by a professional mechanic.


The P0250 code is a common issue for vehicles with turbocharged engines, indicating a problem with the wastegate solenoid B low. While the symptoms can be severe, the fixes are generally straightforward and can be done by a DIYer with some mechanical knowledge and tools. If you are not comfortable diagnosing or repairing the problem yourself, it’s best to take your vehicle to a trusted mechanic to ensure proper diagnosis and repair.


  1. Is it safe to drive with the P0250 code?
    No, it’s not safe to drive with the P0250 code, as it can cause engine stalling and other safety hazards. It’s best to diagnose and repair the problem as soon as possible.
  2. How much does it cost to replace the wastegate solenoid B?
    The cost of replacing the wastegate solenoid B can vary depending on the make and model of your vehicle, as well as the labor costs of your mechanic. Generally, you can expect to pay anywhere from $50 to $200 for the part and $100 to $300 for labor.
  3. Can I reset the P0250 code without fixing the problem?
    No, resetting the P0250 code without fixing the underlying problem will not solve the issue. The code will likely come back, and the symptoms may worsen over time.
  4. How can I prevent the wastegate solenoid B from failing?
    To prevent the wastegate solenoid B from failing, it’s essential to keep your engine well-maintained and avoid harsh driving conditions. Regular oil changes, air filter replacements, and coolant flushes can help prolong the life of your engine and its components.
  5. Can I drive my vehicle without a wastegate solenoid B?
    No, you cannot drive your vehicle without a functioning wastegate solenoid B. This part is crucial for regulating the turbo boost pressure and ensuring optimal engine performance. Driving without it can cause severe damage to your engine and even safety hazards.