P2BF7Exhaust Flow Control Valve A Position Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2BF7 is set when the position feedback of exhaust valve A rises above its plausible maximum. Electrically that points to the signal line touching the sensor reference or battery voltage, or to a lost sensor ground, which lets the input float up to its pull-up level. Deutz assigns P2BF7 with failure type 12 to a flap voltage that is too high or shorted to positive on its MD1 industrial engines, the counterpart to P2BF6. Mazda covers it for the 2024 CX-5 in service alert SA-056-23 together with P2BF5 and P2BF6, which concern the exhaust shutter valve used with cylinder deactivation; thresholds are not published there. CARB requires out-of-range checks on such inputs. Before condemning the valve, measure its ground and signal line with the actuator unplugged.
- What you may notice
- Check engine light on
- Exhaust flap held in its default position
- Exhaust sound no longer changes as expected
- Likely causes
- LikelyOpen sensor ground letting the signal float high
- PossibleSignal wire shorted to reference or battery voltage
- PossiblePosition sensor in the valve assembly failed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.