Where is the Intelligent battery sensor located?

2010 BMW 750LI
111,111 MILES • V12 • 2WD • AUTOMATIC
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BLESSING EWOBOR
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There is a code on the ECU stating (CD8F01- LIN, message; intelligent battery sensor (IBS): Missing).
Where can I locate the sensor and how can it be tested for?
Feb 27, 2024 at 10:48 AM
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STEVE W.
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The sensor is part of the negative battery cable clamp. That fancy block with wiring that goes to the breakout box on top of the battery. Testing wise, you need the BMW factory scan tool or a very good aftermarket unit. In it there is a menu that tests the battery charging and the IBS responses during the test. Missing could be that the LIN connection is unplugged because of a different error. There is a TSB for the more common error. If you find it unplugged and get the error when it's plugged back in you can follow the TSB.

https://static.nhtsa.gov/odi/tsbs/2014/MC-10147923-9999.pdf
Feb 27, 2024 at 12:55 PM
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BLESSING EWOBOR
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Thank you.
Feb 27, 2024 at 2:33 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
You are welcome. You might want to set down before pricing a replacement if it shows as a failed part.
Feb 28, 2024 at 12:15 AM
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