BMW DTC P0049 – Turbocharger/Supercharger ‘A’ Turbine Overspeed
DTC P0049 meaning on BMW
DTC P0049 for BMW refers to the Turbocharger/Supercharger ‘A’ Turbine Overspeed condition. This diagnostic trouble code indicates that the engine control module (ECM) has detected that the turbocharger or supercharger turbine is spinning at a speed higher than the specified limit.
BMW DTC P0049 symptoms
Symptoms of DTC P0049 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine power
- Loss of boost pressure
- Engine running rough or misfiring
BMW DTC P0049 causes
Common causes of DTC P0049 on a BMW include:
- Wastegate malfunction
- Boost control solenoid failure
- Turbocharger or supercharger mechanical issue
- Wiring or connector problems in the turbocharger system
BMW DTC P0049 seriousness
DTC P0049 should be addressed promptly as it can lead to engine performance issues and potential damage to the turbocharger or supercharger components. Ignoring this code may result in further engine problems and reduced drivability.
How to diagnose DTC P0049 on BMW
To diagnose DTC P0049 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM
- Inspect the turbocharger system for any visible damage or leaks
- Check the wastegate operation and boost control solenoid
- Test the wiring and connectors in the turbocharger system for continuity and proper voltage
How to fix DTC P0049 on BMW
To fix DTC P0049 on a BMW, the following steps may be taken:
- Repair or replace any damaged components in the turbocharger system
- Address any wiring or connector issues in the turbocharger system
- Test and replace the wastegate or boost control solenoid if necessary
- Clear the fault codes from the ECM and test drive the vehicle to ensure the issue is resolved
How to erase DTC P0049 on BMW
To erase DTC P0049 on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made to address the underlying issue causing the fault code, the ECM can be reset to clear the code. It is important to ensure that the repairs have been successful before clearing the fault code to prevent it from reoccurring.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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