Quote:
Originally Posted by thecodefather
yeah I expected that I suppose. wondering if anyone has ever had that code combo also since I haven't seen it anywhere else.
as for the shadow codes, should I be concerned about those or are they just benign?
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How many miles on your car? From this post, it could be your pressure converter (also known as wastegate solenoid / actuator). go to realoem for the correct part number, it might be the same as the below post.
https://www.e90post.com/forums/showthread.php?t=1151688
Quote from this thread.
Bumping for google index because there aren't too many online records of this issue:
2011 N55 335i coupe e92lci
- In my case, no change of engine bay sound at all.
- Half engine light when building boost above ~3k rpm.
- Loss of low end and high end power, degraded fuel efficiency
- Active DME codes (need bmw specific scanner to read):
2C57 - Charging pressure control, plausibility Pressure too low.
387F - Power management: Standby current violation.
- Replaced the pressure converter:
Genuine BMW - 11747626351 - Pneumatic Wastegate Actuator
- Issue resolved, full boost restored.
Edit: also, maybe take it to a knowledgeable indy shop or dealer. you could run into the problem of just throwing new parts at the car that are unnecessary. not a bad idea for the pressure converter though since part i think is less than $150 and DIY-able if you have some comfort wrenching / plenty of online DIY videos for the N55