TT-21-10-01

Service Bulletin Details

Public Details for: TT-21-10-01

Volkswagen: diagnosis n75 solenoid valve on turbocharger, with fault codes P0299 and P0234, that leads to testing on which vacuum ports that would hold and which ones will not. No models were listed. Model years 2006-2013 with 2.0t gaso

- 1998 -

Models from 1998

1998 VOLKSWAGEN BEETLE

SB-10051241-2747
Tech Tips
Date: April 2, 2012
TT 21-10-01
2006-2013 Vehicles with 2.0T Gasoline Engine (Engine Codes
BPY, CCTA, CBFA) - N75 Solenoid Valve Diagnosis
November 16, 2012: Updated to clarify applicability and add
additional model years
Previously posted as TT 20-09-05
When diagnosis on the above engine leads to the testing of the N75, please refer to the picture below. The
diagram shows which vacuum ports on the N75 valve should hold vacuum and which ones should not.
Turbocharger fault codes P0299 and P0234 can be diagnosed using this test.
Note: For further information on how Gasoline Turbochargers work, check out our 3 Quick Tips that
explain it all. You can find Quick Tips in VW Websource>Quick Tips> Quick Tips for technicians.
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