P2BA3
Starter/Generator Mechanical Performance
The hybrid control module detects that the integrated starter/generator does not deliver the expected mechanical torque or speed for the commanded operation. Belt slippage, bearing wear, or coupling fault.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Drive belt slipping or wornCommon
- Starter/generator bearing wornPossible
Parts involved
- Starter Generator
- Drive Belt
- Hybrid Control Module
P2BA3 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.