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P0299 Diagnostic Trouble Code Discussion for August 2008

Turbocharger Engine Underboost

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Trouble Ticket Help Requests for DTC P0299
Help Request Posted
2003 Audi A4 1.8L MIL Lamp on VIN: WAUVC68E83
P0299: Boost pressure regulation range not reached. Help Audi Techs! This is a used car lot vehicle. Boost pressure spec is 1550 milibar- vehilce can only develop 1470 milibar. Used car lot replaced bypass valve, we tested vehicle and repaired a vacuum leak at a vacuum check valve and tested/ inspected the ball...
August 06, 2008
2004 Volkswagen Golf GLS TDI 1.9L Excessive Emissions, Hesitation, MIL Lamp on VIN: 9BWGR61J34
P0299: Boost pressure regulator control range not reached. Two of the three codes stored were for the oxygen sensor heater and output circuits open. Replaced the oxygen sensor. Performed the output diagnostic test with the VAG-COM program and all tested components passed. Tried a known good boost/temp sensor on top of...
August 25, 2008