P0249 Fault Code

P0249 OBD-II Trouble Code Short Description

Turbocharger Wastegate Solenoid B Low

What does trouble code P0249 mean?

The P0249 fault code indicates a problem with the wastegate solenoid B in the turbocharger system of a vehicle. The wastegate solenoid is responsible for regulating the amount of pressure that reaches the turbocharger, and if it is not functioning correctly, it can cause reduced performance and increased emissions.

The problem can be caused by a variety of issues, including a malfunctioning solenoid, a damaged wiring harness, or a faulty control module. To diagnose the issue, a mechanic will need to use a scan tool to retrieve the trouble codes and perform a visual inspection of the turbocharger system. Once the issue has been identified, the necessary repairs can be made to fix the problem.

The solution to a P0249 code will vary depending on the specific cause of the problem. In some cases, a simple repair, such as replacing a damaged wiring harness or solenoid, may be sufficient. In other cases, the entire turbocharger system may need to be replaced to resolve the issue.

Ignoring a P0249 code can lead to further damage to the vehicle's engine and could result in costly repairs down the road. Therefore, it is essential to have the problem diagnosed and repaired as soon as possible to keep the vehicle running smoothly and efficiently.


What are the symptoms of the P0249 code?

P0249 is a fault code related to the turbocharger wastegate solenoid in the B circuit being low. This means that the signal voltage from the solenoid to the engine control module is too low, which can cause several symptoms:

  1. Check Engine Light: The first symptom is that the Check Engine Light will come on and stay on until the problem is resolved.

  2. Reduced Engine Power: The engine may lose power if the wastegate solenoid is not operating correctly. This can be felt as a lack of acceleration or a slower top speed.

  3. Poor Fuel Economy: If the engine is not running efficiently, it may consume more fuel than usual, resulting in poorer fuel economy.

  4. Rough Idling: The engine may idle roughly and may even stall if the wastegate solenoid is not functioning correctly.

If you are experiencing any of these symptoms, it is recommended to have your vehicle checked by a qualified mechanic to diagnose and repair the issue causing the P0249 fault code.


What causes the P0249 code?

There are several possible causes for the P0249 fault code on cars, including:

  • Faulty wastegate solenoid B
  • Open or short circuit in the wiring of the wastegate solenoid B
  • Malfunctioning turbocharger or turbocharger actuator
  • Blocked or restricted exhaust system
  • Malfunctioning boost pressure sensor
  • Failed engine control module (ECM)

Proper diagnosis is necessary to determine the exact cause of the fault code and to carry out the appropriate repairs.

Possible Solutions

How to fix P0249?

To fix the P0249 fault code, follow these steps:

  1. Check the vacuum hoses for leaks or damage.
  2. Inspect the wastegate solenoid B circuit for any wiring issues.
  3. Test the wastegate solenoid B using a multimeter to check if it has failed.
  4. Inspect the turbocharger for any damage or blockages.
  5. Check the exhaust system for any leaks or damage.
  6. Clear the fault code from the ECU and test drive the vehicle to see if the issue persists.

If the issue persists after performing these steps, it may be necessary to replace the wastegate solenoid B or seek the assistance of a professional mechanic.