From Ross-Tech Wiki

19559/P3103 - Motor for Intake Manifold Flap (V157), Malfunction

Possible Symptoms

  • Higher fuel consumption
  • Insufficient acceleration above 100-120 kmh
  • Shutting off the engine is not nice and easy

Possible Causes

  • Intake Manifold Flap (V157) or the motor for V157 doesn't work well.

Possible Solutions

  • Check wiring and connections
  • Check / Replace V157, but probably you have to replace the whole EGR

Special Notes

  • The Intake Manifold Flap (V157) has a function in the EGR and in shutting off the (diesel) engine.