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

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.