Diagnostic help

Fault diagnosis concerns a leak in the hose to the sensor or between the compressor and the throttle body.

Functions in the diagnostic tool related to the fault:

• Diagnostic status for the diagnosis.
• Pressure sensor value, unit kPa.

During acceleration, the value should exceed the value for the two other pressure sensors.

This DTC is generated if the turbocharger is not able to build up pressure when the enable criteria for the diagnosis have been fulfilled. This can be due to any of the following causes:

• Defective turbo unit, e.g. open wastegate valve or sticking turbine shaft.
• Major air leak between turbocharger and throttle body.

  This usually results in poor driveability and black exhaust smoke. Even trouble codes indicating misfiring or an adaptation fault may occur in case of a major air leak.

• Catalytic converter or exhaust system blockage.

  If the flow of exhaust from the turbocharger is obstructed too much, the turbine speed will not be high enough to provide sufficient boost pressure. This will result in considerably impaired engine performance. Misfiring can also occur, above all at high engine speeds.

See also description of read value under "READ VALUES " menu for more information.