OBD-II code · Powertrain (generic, extended)
P2C29 Turbocharger/Supercharger Bypass Valve B Stuck
The turbocharger/supercharger bypass valve B reports a stuck condition. Boost recirculation cannot be commanded reliably on this branch.
Is it safe to drive with P2C29?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBypass valve mechanically seized
- PossibleCarbon deposits jam the valve
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
- P2CD5Turbocharger/Supercharger Bypass Valve C Stuck
- P2C26Fuel Injector Group B Supply Sense Circuit
- P2C27Fuel Injector Group B Supply Sense Circuit Low
- P2C28Fuel Injector Group B Supply Sense Circuit High
- P2C2ATurbocharger/Supercharger Bypass Valve B Position Sensor Circuit/Open
- P2C2BTurbocharger/Supercharger Bypass Valve B Position Sensor Circuit Low
- P2C2CTurbocharger/Supercharger Bypass Valve B Position Sensor Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.