Powertrain
Definition only
Lights the check engine lamp
P2D58: Generator B Mechanical Performance
Standardized SAE J2012 code · P2Dxx codes
What does P2D58 mean?
Generator B does not deliver the expected mechanical-to-electrical conversion. Bearing wear, drive coupling slip, or rotor imbalance.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Generator bearing worn
- Medium Drive coupling slip
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2D58 on the same make and model first.
P2D58 in the community
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