P0249 – OBD-II DTC

OBD-II DTC P0249 – Turbocharger Wastegate Solenoid B Range/Performance

DTC P0249 meaning

DTC P0249 refers to a diagnostic trouble code that indicates an issue with the turbocharger wastegate solenoid B. This code is triggered when the Engine Control Module (ECM) detects that the performance or range of the wastegate solenoid is outside of the expected parameters. The wastegate solenoid controls the flow of exhaust gases to the turbocharger, which in turn regulates boost pressure. When this system malfunctions, it can lead to performance issues in the engine.

DTC P0249 symptoms

Common symptoms associated with DTC P0249 may include:

• Reduced engine power or acceleration
• Increased turbo lag
• Check Engine Light illuminated
• Unusual engine noises, such as hissing or whistling
• Poor fuel economy
• Engine stalling or misfiring

DTC P0249 causes

Several factors can lead to the triggering of DTC P0249, including:

• Faulty turbocharger wastegate solenoid B
• Wiring issues, such as damaged or corroded connectors
• Vacuum leaks in the wastegate control system
• Faulty turbocharger or wastegate assembly
• Issues with the Engine Control Module (ECM)
• Blocked or restricted exhaust flow

DTC P0249 seriousness

The seriousness of DTC P0249 can vary depending on the underlying cause. While it may not cause immediate catastrophic failure, it can lead to:

• Decreased engine performance
• Increased emissions
• Potential damage to the turbocharger
• Long-term engine wear if not addressed

It is advisable to diagnose and repair the issue promptly to avoid further complications.

How to diagnose DTC P0249

To diagnose DTC P0249, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P0249 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the turbocharger wastegate solenoid B and its wiring for damage or corrosion.
4. Test the wastegate solenoid for proper operation using a multimeter.
5. Check for vacuum leaks in the wastegate control system.
6. Examine the turbocharger and wastegate assembly for any mechanical issues.
7. Review the vehicle’s service history for any previous repairs related to the turbo system.

How to fix DTC P0249 step-by-step instructions

To fix DTC P0249, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and repair any damaged wiring or connectors related to the wastegate solenoid.
3. Replace the turbocharger wastegate solenoid B if it is found to be faulty.
4. Fix any vacuum leaks in the wastegate control system.
5. Ensure the turbocharger and wastegate assembly are functioning correctly.
6. Recheck the system for any additional trouble codes after repairs.
7. Test drive the vehicle to ensure the issue is resolved and the Check Engine Light does not reappear.

How to erase DTC P0249

To erase DTC P0249, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the engine to verify that the Check Engine Light is off.

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