Turbo codes 123432 and123401?

2013 BMW 328
210,000 MILES • TURBO • AUTOMATIC
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BHAMDOC1
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Am used to seeing these codes on most of these bmws 2012 and up. They still drive fine but not sure if it's definitely the turbo or could be something else
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Jul 3, 2026 at 4:51 PM
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STRAILER
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Can you please list the codes in the post?
Jul 3, 2026 at 5:10 PM
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BHAMDOC1
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123432
123401
Jul 3, 2026 at 6:31 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Okay it looks like the waste gate system is not working.

123401: Electric wastegate limit-stop learning/adaptation malfunction
123432: Wastegate closed position is outside the allowable tolerance

I would inspect the wastegate arm for looseness or binding, check the actuator connector and wiring if that looks okay I would replace the waste gate actuator.

Make sure the vacuum line is in good shape, the diaphragm inside the actuator go out and leak. Clear the codes when completed. Check out the images (below). Please let me know what happens.
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Jul 4, 2026 at 2:19 PM
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