Diesel Intake Air Flow B Control Stuck Open
Diesel intake air flow valve B is mechanically stuck open - the ECU cannot close it for anti-shudder shutdown or EGR mixing assistance.
Affected components
- Diesel intake air flow b
Common causes
- High likelihood: Valve stuck open due to soot or broken linkage
- Low likelihood: Carbon or debris buildup preventing free movement
- Low likelihood: Component wear with age - mechanical play
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.