Exhaust Flow Control Valve A Control Performance
The exhaust flow control valve A responds to commands but the resulting flow or back-pressure does not match expectations. Worn flap or carbon coking on the bore.
Affected components
- Exhaust flow valve a
- Actuator
Common causes
- High likelihood: Worn valve flap loses sealing
- Medium likelihood: Carbon coking restricts valve travel
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.