Powertrain
Definition only
Lights the check engine lamp
P2C2B: Turbocharger/Supercharger Bypass Valve B Position Sensor Circuit Low
Standardized SAE J2012 code · P2Cxx codes
What does P2C2B mean?
The turbocharger/supercharger bypass valve B reports a position sensor circuit low condition. Boost recirculation cannot be commanded reliably on this branch.
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 Signal wire shorted to ground
- Medium Internal sensor short
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2C2B on the same make and model first.
P2C2B in the community
Ask about P2C2BNo one has posted about P2C2B yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P2C2B problem