How does a fault code arise in the Body and Comfort group?
Codes starting with B belong to the body and comfort side: central locking, window and mirror motors, interior and exterior lighting, climate control, seat modules, alarm and immobiliser. Most of this work is not done by a single box but spread across several interconnected comfort modules.
Codes typically appear when an output (motor, relay, lamp) does not draw the expected current, a switch reports an impossible position, or one module asks another a question and gets no answer. On the body side, battery voltage and ground quality are unusually decisive: a weak battery or a corroded chassis ground can produce many apparently unrelated codes at once.
So the first question when looking at a body code list is not “which part is broken” but “do these codes share a supply, ground or communication point”. Measure battery voltage and record the list before clearing anything.
Fault codes in this group
The database holds 11 codes in this group. Each code has its own page with the meaning, possible causes and diagnostic steps:
Read fault codes on your own vehicle
With an ELM327-based BLE OBD2 adapter, CarCoding reads confirmed, pending and permanent fault codes separately, pulls the freeze frame and explains every code in plain language. Clearing codes is done from the app as well. The app is free to download.
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Data source: the CarCoding fault code database. Code definitions follow the SAE J2012 standard; manufacturers may use different wording for their own codes. Everything on this page is generated from the code-specific database records.