OBD-II code · Powertrain (generic, extended)
P2BF8 Exhaust Flow Control Valve B Control Circuit/Open
The exhaust flow control valve B reports a control circuit/open condition. Exhaust routing for back-pressure or noise control cannot be commanded reliably.
Is it safe to drive with P2BF8?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyOpen in actuator control wire
- PossibleOpen actuator coil
- Less likelyPin pushed back out of connector body
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
- Exhaust Flow Control Valve B, Wiring Harness, Ecm
Related codes
- P2D13Exhaust Flow Control Valve C Control Circuit/Open
- P2BF5Exhaust Flow Control Valve A Position Circuit Range/Performance
- P2BF6Exhaust Flow Control Valve A Position Circuit Low
- P2BF7Exhaust Flow Control Valve A Position Circuit High
- P2BF9Exhaust Flow Control Valve B Control Circuit Low
- P2BFAExhaust Flow Control Valve B Control Circuit High
- P2BFBExhaust Flow Control Valve B Control Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.