P3135 - Airflow Control Valve: Exceeds Limit. (Solution)

Possible causes for P3135, Airflow Control Valve for Airflow Control: Lower limit not reached/Upper limit exceeded:
- Wiring/electrical connections to the suction nozzle valve(s) are faulty.
- Suction tube valve(s) defective

Possible solutions:
- Check the wiring/electrical connections to the suction nozzle valve(s).
- Replace suction tube valve(s).

Additional information for 3.0 V6 TDI engines: It is recommended to replace both intake valve covers at the same time. (Also check for error codes P1018, P2008 and P2011)