[aidanrodonne]

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My 2011 335xi keeps randomly throwing a 2c57 code at different rmps and times throughout each time I drive my car even after I clear it, I have replaced a few things which I would have thought would be related to the code suck as my charge pipe, boost converter, and my (MAP) or boost pressure sensor, and from what I can tell the car doesn’t have a boost leak. So what could my issue be?

[pikkagtr]

Have you done a pressure test to verify no leaks?
If so it may be the pressure converter


Genuine BMW - 11747626351 - Pneumatic Wastegate Actuator

[aidanrodonne]

Originally Posted by pikkagtr

Have you done a pressure test to verify no leaks?
If so it may be the pressure converter


Genuine BMW - 11747626351 - Pneumatic Wastegate Actuator

I replaced my pressure converter and it never solved the issue, and I have not pressure tested the system, I have just smoke tested the cars entire boost system.