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      05-25-2020, 11:42 PM   #1
djeieidhds
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Last edited by djeieidhds; 06-04-2020 at 02:30 AM..
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      05-26-2020, 04:53 PM   #2
Bali
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I think you’ve interpreted the code incorrectly. This BMW-specific code lookup website shows that it is wastegate related. Probably should read the code with a BMW-specific scanner such as INPA, Carly, etc.
https://bmwfault.codes/

Engine PCode Code Label Fault Info ECU Variant
N20 P1290 123401 Electric wastegate, learning limit stop: Malfunction MEVD1724
N20 P1290 2CA4 Electric wastegate, learning stop, cold start: Malfunction MEVD174
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      05-30-2020, 07:26 AM   #3
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I recently started getting the engine malfunction reduced power warning, but only after a long drive, and immediate restart within 5-10 minutes. If I wait it out, it goes away and car runs fine. Also pulled the P1290 code and on the web under BMW it says CHT (cylinder head temperature sensor). I think I will start there since it is a cheap part and easy swap. BTW just passed 160k trouble free miles!

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