Exhaust Flow Control Valve A Control Circuit / Open
The controller cannot drive the exhaust flow control valve A (used for exhaust acoustics, EGR boost, or aftertreatment heating).
Affected components
- Exhaust flow valve a
- Solenoid
- Wiring harness
Common causes
- High likelihood: Open coil in valve solenoid
- Medium likelihood: Broken control wire
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.