OBD-II code · Powertrain (generic, extended)
P2C2B Turbocharger/Supercharger Bypass Valve B Position Sensor Circuit Low
The turbocharger/supercharger bypass valve B reports a position sensor circuit low condition. Boost recirculation cannot be commanded reliably on this branch.
Is it safe to drive with P2C2B?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- Parts involved
- Turbo Bypass Valve B, Wiring Harness, Ecm
Related codes
- P2BBCTurbocharger/Supercharger Bypass Valve A Position Sensor Circuit Low
- P2C28Fuel Injector Group B Supply Sense Circuit High
- P2C29Turbocharger/Supercharger Bypass Valve B Stuck
- P2C2ATurbocharger/Supercharger Bypass Valve B Position Sensor Circuit/Open
- P2C2CTurbocharger/Supercharger Bypass Valve B Position Sensor Circuit High
- P2C2DTurbocharger/Supercharger Bypass Valve B Position Exceeded Learning Limit
- P2C2ETurbocharger/Supercharger Bypass Valve B Supply Voltage Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.