Diesel Intake Air Flow B Control System Low Air Flow Detected
Same as P239C with the airflow below the threshold when the valve is commanded open - valve does not open fully or the path is restricted.
Affected components
- Diesel intake air flow b
Common causes
- High likelihood: Valve does not open fully
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.