OBD-II code · Powertrain (generic, extended)
P2BBB Turbocharger/Supercharger Bypass Valve A Position Sensor Circuit
The turbocharger/supercharger bypass valve A reports a position sensor circuit condition. Boost recirculation cannot be commanded reliably.
Is it safe to drive with P2BBB?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPosition sensor failed
- PossibleWiring or connector fault
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 A, Wiring Harness, Ecm
Related codes
- P2BB8Engine Coolant Temperature Sensor 6 Circuit Low
- P2BB9Engine Coolant Temperature Sensor 6 Circuit High
- P2BBAEngine Coolant Temperature Sensor 6 Circuit Intermittent/Erratic
- P2BBCTurbocharger/Supercharger Bypass Valve A Position Sensor Circuit Low
- P2BBDTurbocharger/Supercharger Bypass Valve A Position Sensor Circuit High
- P2BBETurbocharger/Supercharger Bypass Valve A Position Exceeded Learning Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.