Vaut aussi pour le P0651 : (source: rosstech)
http://wiki.ross-tech.com/wiki/index...6/P0652/001618
Possible Causes
* Wiring/Connectors from/to Intake Manifold Pressure Sensor (G31) faulty
* Intake Manifold Pressure Sensor (G31) faulty
* Engine Control Module faulty
Possible Solutions
* Check Wiring/Connectors from/to Intake Manifold Pressure Sensor (G31)
* Check/Replace Intake Manifold Pressure Sensor (G31)
* Replace Engine Control Module
When found in 1.9l TDI (BEW):
* Check Atmospheric Pressure (MVB 010.2) and Intake Manifold Pressure Sensor (MVB 010.3). Compare both Values with Engine OFF, the Tolerance should be +/- 50 mbar.
* Check Variable Nozzle Turbocharger (VNT). Specifically, check the electronic actuator position sensor G500 , including unplugging it for testing.