Fault description

Diagnosis monitors during control unit run-on whether the ambient pressure sensor, intake manifold pressure sensor and pressure sensor before throttle valve measure the same pressure.

The fault code is detected when while after running the display of the sensor value deviates by approx. 80 mbar from the other pressure sensors (MAX fault). Cylinder bank 1

Possible cause of fault:

• Sensor line with shunt circuit
• Sensor measurement defective