Pressure Too High

Pressure too high

Checking the hoses and the turbocharger (TC) control valve
Check that the hoses between the pressure servo for the boost pressure control (BPC) valve and the turbocharger (TC) control valve are not trapped, blocked or damaged.
Check that the hoses between the turbocharger (TC) control valve and the charge air pipe (between the turbocharger (TC) and the charge air cooler (CAC)) are not trapped, blocked or damaged.
Check the turbocharger (TC) control valve by activating it. The turbocharger (TC) control valve must click when it is activated.
Check the setting of the waste gate valve's pressure servo as well as the waste gate valve. Check the function and check for jamming according to: Wastegate valve, adjusting, B5254T2 Wastegate Valve, Adjusting

Other information:
- To access the turbocharger (TC) control valve, see Replacing the turbocharger (TC) control valve, B5244T5, B5254T2 Service and Repair.





Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.




- Ignition off.
- Reinstall connectors, components etc.
- Disconnect the VCT 2000 from the data link connector (DLC).
- Test drive the car and check that high boost pressure is obtained.
- Connect the VCT 2000 to the data link connector (DLC).

Note! Do not switch off the ignition before the VCT 2000 has been connected and the boost pressure has been tested with the smart tool.

Read off the boost pressure fault status
When the boost pressure has been tested the display should show that the diagnostic is complete.









Is the fault status display as not found ?

Yes - VERIFIED

No - VERIFICATION FAILEDPAPER

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the hoses and the turbocharger (TC) control valve

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