P00FF
Body Control Module Requested MIL Illumination
The Body Control Module (BCM) sent a request to the engine ECU to illuminate the MIL — actual fault is in a body system; this is a forwarded request, not a powertrain fault.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Underlying BCM fault — read BCM codesCommon
Parts involved
- Body Control Module
- CAN Bus
P00FF is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.