Powertrain
Definition only
Lights the check engine lamp
P2BBF: Turbocharger/Supercharger Bypass Valve A Supply Voltage Low
Standardized SAE J2012 code · P2Bxx codes
What does P2BBF mean?
The turbocharger/supercharger bypass valve A reports a supply voltage low condition. Boost recirculation cannot be commanded reliably.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Common causes
- High Supply fuse blown
- Medium Supply wire shorted to ground
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2BBF on the same make and model first.
P2BBF in the community
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