Body Control Module (BCM) Internal Fault
The BCM has detected an internal fault.
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 manages many functions like lights and windows, is saying it has a problem inside.
What the computer is actually seeing
The BCM registers an internal error code that it cannot clear, indicating a self-diagnostic failure.
What a healthy reading looks like
BCM should respond to commands and communicate normally; expect normal voltage levels (typically 5V or 12V on pins).
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 the wiring and connectors to the BCM for damage or corrosion. Secure any loose connections.
- 22. Use a scan tool to check for any additional codes in the BCM. Note any codes found.
- 33. Clear the codes and see if B1016 returns immediately. If it does, suspect a faulty BCM.
- 44. If no additional codes present, test the BCM power and ground circuits—expect battery voltage on power pins.
- 55. If signals and power are correct but B1016 remains, replace the BCM.
Common causes
- Defective Body Control Module
- Corroded or damaged wiring to the BCM
- Faulty connectors to the BCM
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's usually safe to drive, but some electrical functions may not work properly.
Will this code come back after resetting?
Yes, if the internal fault persists, it will come back.
Why do I see this code with other BCM codes?
An internal fault can trigger other related codes, indicating multiple issues may stem from the BCM.
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