BMW DTC P226B – Turbocharger/Supercharger Boost Pressure Too High – Mechanical
DTC P226B meaning on BMW
DTC P226B on a BMW indicates that the turbocharger/supercharger boost pressure is too high due to a mechanical issue. This fault code is triggered when the actual boost pressure deviates significantly from the desired boost pressure set by the engine control module.
BMW DTC P226B symptoms
Symptoms of DTC P226B on a BMW may include:
- Check Engine Light (CEL) illuminated
- Reduced engine power
- Engine knocking or pinging under load
- Excessive exhaust smoke
- Decreased fuel efficiency
BMW DTC P226B causes
Common causes of DTC P226B on a BMW include:
- Wastegate malfunction
- Boost pressure sensor failure
- Leaking or damaged intercooler
- Boost pressure control valve issues
- Turbocharger/supercharger mechanical failure
BMW DTC P226B seriousness
Ignoring DTC P226B on a BMW can lead to potential engine damage and reduced performance. It is important to address this issue promptly to prevent further complications and ensure the longevity of the turbocharger/supercharger system.
How to diagnose DTC P226B on BMW
To diagnose DTC P226B on a BMW, a mechanic may perform the following steps:
- Scan the vehicle’s onboard computer for fault codes
- Inspect the turbocharger/supercharger system for leaks or damage
- Check the wastegate operation and boost pressure sensor readings
- Perform a boost pressure test to verify actual vs. desired boost levels
How to fix DTC P226B on BMW
To fix DTC P226B on a BMW, the following steps may be taken:
- Repair or replace any damaged components in the turbocharger/supercharger system
- Clean or replace the boost pressure sensor if faulty
- Adjust or replace the wastegate if not functioning correctly
- Ensure proper installation and sealing of the intercooler
- Perform a test drive and monitor boost pressure levels for proper operation
How to erase DTC P226B on BMW
To erase DTC P226B on a BMW, the fault code can be cleared using a diagnostic scanner or by disconnecting the vehicle’s battery for a few minutes. However, it is recommended to address the underlying issue causing the fault code before clearing it 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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