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P0234 Diagnostic Trouble Code Discussion for February 2009

Turbocharger Engine Overboost

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Trouble Ticket Help Requests for DTC P0234
Help Request Posted
2004 Volkswagen Passat GL 1.8L MIL Lamp on VIN: VWCC21VX14
P0234: turbo overboost. ... this passat 1.8 turbo with a code p0234 turbo overboost.seen other posts about 1.9diesel engines with variable vane turbos sticking.so i removed this one only to find it is a regular turbo with no sticking vanes.so i applied voltage to valve 75 and it work...
February 10, 2009
2003 Audi A4 1.8L MIL Lamp on VIN: WAULC68E13
P0234: manufacturer code 16618 boost pressure. since last visit intermittent mil for turbo boost pressure failure. we have rechecked all previous work, and all turbo lines. no problem found, but light will display.
February 16, 2009