OBD-II code · Powertrain (generic, extended)
P2C2A Turbocharger/Supercharger Bypass Valve B Position Sensor Circuit/Open
The turbocharger/supercharger bypass valve B reports a position sensor circuit/open condition. Boost recirculation cannot be commanded reliably on this branch.
Is it safe to drive with P2C2A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyOpen in sensor signal wire
- PossiblePosition sensor failed
- Less likelyPin pushed back out of connector body
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
- P2C27Fuel Injector Group B Supply Sense Circuit Low
- P2C28Fuel Injector Group B Supply Sense Circuit High
- P2C29Turbocharger/Supercharger Bypass Valve B Stuck
- P2C2BTurbocharger/Supercharger Bypass Valve B Position Sensor Circuit Low
- P2C2CTurbocharger/Supercharger Bypass Valve B Position Sensor Circuit High
- P2C2DTurbocharger/Supercharger Bypass Valve B Position Exceeded Learning Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.