Exhaust Flow Control Valve A Position Circuit Low
The exhaust flow control valve A reports a position circuit low condition. Exhaust routing for back-pressure or noise control cannot be commanded reliably.
Affected components
- Exhaust flow control valve a
- Wiring harness
- Ecm
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Internal sensor short
- Low likelihood: Connector pins corroded - high contact resistance
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.