Body Control Module (BCM) Fault
BCM detects an internal fault or communication error.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The Body Control Module, which controls functions like lights and locks, is having issues talking to other parts or has an internal problem itself.
What the computer is actually seeing
The BCM sees a faulty condition or communication failure within its internal circuits or with other modules.
What a healthy reading looks like
BCM should respond to commands within 10ms and maintain a voltage between 10-14V under operation.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect wiring and connectors between BCM and other modules for damage or corrosion. Decision: If damaged, repair or replace them. If not, move to step 2.
- 22. Check the battery voltage. Should be between 12.4V and 14.8V. Decision: If voltage is out of this range, charge or replace the battery. If within range, proceed to step 3.
- 33. Use a scan tool to check for additional codes related to the BCM. Decision: If related codes are present, troubleshoot those first. If only B2206 is present, move to step 4.
- 44. Clear the fault codes and retest the system. Decision: If the code comes back immediately, consider replacing the BCM. If it does not return, further monitoring may be needed.
Common causes
- Wiring issues between BCM and other components
- Faulty BCM
- Corroded connectors
- Low battery voltage
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code active?
Yes, but you may experience issues with accessories like lights and locks. Fix it soon.
Will the code come back after clearing?
It may; if the problem persists, take further diagnostic steps.
Why does this code pair with others?
Often there are multiple related faults in the electrical system, indicating broader issues.
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