Exhaust Flow Control Valve B Position Circuit Range/Performance
The exhaust flow control valve B reports a position circuit range/performance condition. Exhaust routing for back-pressure or noise control cannot be commanded reliably.
Affected components
- Exhaust flow control valve b
- Wiring harness
- Ecm
Common causes
- High likelihood: Sensor offset drifted
- Medium likelihood: Linkage between sensor and valve loose
- Low likelihood: Sensor element aged beyond calibration window
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.