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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Starter generator
- Drive belt
- Hybrid control module
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Drive belt slipping or worn
- Starter/generator bearing worn
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.