A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.
Possible causes
- Flap actuator
- Carbon deposits
- Actuator linkage or vacuum hose
What you can do yourself
- The flap actuator needs checking.
- The flaps sit in the intake manifold and change the airflow to suit engine speed. On diesels they often get coated with soot from the EGR — then the manifold is removed and cleaned.
- Usually the car drives as before; a diesel may go into limp mode with weak pull.
The explanation comes from the error code reference in the AvtoElektrik PRO app.