P226321

The boost pressure deviates from the specified value. The signal amplitude is less than the minimum amplitude.
Boost pressure


Test 1: Continue

1.
Check component 'Y77/1 (Boost pressure positioner)' by means of actuation.
Legend

- 5 Vacuum unit for boost pressure control flap ( RIGHT )

Continue to actuation with button 'Continue'







Test 1.1: Continue

1.1.

Test 1.1.1: Continue

1.1.1.
Check component 'Y77/1 (Boost pressure positioner)' by means of actuation.
The actuation was OK.
Possible cause and remedy

- Check component 'B28/6 (Pressure sensor upstream of throttle valve)' for dirt.
- Check component 'Turbocharger' for obstructed movement.
- Check exhaust back pressure.
- Check charge air system for leaktightness.
- If there are stored faults or customer complaints, check electrical lines and connectors for loose contact and corrosion.

End of test



End of test
Result: Fail