Could you please tell me the issue and provide one picture?

★ Top Answer

As an American, here's a paraphrase of the given text: The error code 120408 in BMW refers to a charging pressure control issue, causing the system to shut down the relevant component. You can find the diagram at this link: https://f30.bimmerpost.com/forums/attachment.phpattachmentid=1652247&stc=1&d=1499343368. Potential causes include problems with the wastegate pressure converter, a vacuum hose leak, and reduced throttle response. You'll notice the drivetrain malfunction, particularly when driving at high speeds on the highway. It's essential to check the pressure sensors and surrounding wiring for any damage or defects. Replacing the wastegate pressure converter can cost between $180 and $200, depending on whether you choose an aftermarket or original equipment manufacturer (OEM) part.

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