P0249 Mercedes-Benz Code - Turbocharger/Supercharger Wastegate Solenoid 'B' Circuit Low
Quick Answer
This fault code is stored in the Engine Control Module (ECM) when a fault is detected with the wastegate control solenoid circuit. Common causes include Faulty Turbo Boost Control Solenoid Valve, Turbo Boost Control Solenoid Valve harness is open or shorted, Turbo Boost Control Solenoid Valve circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0249 Mercedes-Benz indicates Turbocharger/Supercharger Wastegate Solenoid 'B' Circuit Low.
- Common causes
- Common causes include Faulty Turbo Boost Control Solenoid Valve, Turbo Boost Control Solenoid Valve harness is open or shorted, Turbo Boost Control Solenoid Valve circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0249 Mercedes-Benz Description
What are the Possible Causes of the DTC P0249 Mercedes-Benz?
- Faulty Turbo Boost Control Solenoid Valve
- Turbo Boost Control Solenoid Valve harness is open or shorted
- Turbo Boost Control Solenoid Valve circuit poor electrical connection
- Faulty Engine Control Module (ECM)
- Faulty Wastegate
How to Fix the DTC P0249 Mercedes-Benz?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0249 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0249 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0249 in a Mercedes-Benz related to the Turbocharger/Supercharger Wastegate Solenoid 'B' Circuit Low?
- Common symptoms include a lack of power, reduced engine performance, and possibly a noticeable decrease in fuel efficiency.
2. What are the possible causes of OBDII code P0249 in a Mercedes-Benz?
- The code P0249 in a Mercedes-Benz can be triggered by issues such as a faulty wastegate solenoid, damaged wiring or connectors, or a problem with the wastegate itself.
3. How can I diagnose the Turbocharger/Supercharger Wastegate Solenoid 'B' Circuit Low issue in my Mercedes-Benz?
- Diagnosis typically involves using a scan tool to read the OBDII code, inspecting the wastegate solenoid for any visible damage, and checking the wiring and connectors for any signs of wear or corrosion.
4. Is it safe to continue driving my Mercedes-Benz with OBDII code P0249 present?
- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the turbocharger system and potentially cause more severe issues over time.
5. How can I repair OBDII code P0249 in my Mercedes-Benz?
- Repairing the issue may involve replacing the wastegate solenoid, repairing or replacing damaged wiring or connectors, and clearing the code with a scan tool.
6. Can I reset the OBDII code P0249 in my Mercedes-Benz without fixing the underlying issue?
- While you can clear the code with a scan tool, it is important to address the underlying problem to prevent the code from reoccurring and potentially causing more serious issues.
7. Are there any preventive maintenance tips to avoid OBDII code P0249 in my Mercedes-Benz?
- Regularly inspecting and maintaining the turbocharger system, including the wastegate solenoid and associated components, can help prevent issues that may trigger code P0249.
8. How much does it typically cost to repair OBDII code P0249 in a Mercedes-Benz?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve parts and labor costs ranging from a few hundred to over a thousand dollars.
9. Can a DIY enthusiast fix OBDII code P0249 in a Mercedes-Benz, or is professional help recommended?
- While some enthusiasts may have the skills and tools to address the issue themselves, working on the turbocharger system can be complex, so professional help is often recommended to ensure proper diagnosis and repair.
10. Will fixing OBDII code P0249 improve the overall performance and efficiency of my Mercedes-Benz?
- Yes, addressing the Turbocharger/Supercharger Wastegate Solenoid 'B' Circuit Low issue can help restore engine performance, improve fuel efficiency, and prevent further damage to the turbocharger system.
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