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P0234 Diagnostic Trouble Code Discussion for September 2013

Turbocharger Engine Overboost

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Trouble Ticket Help Requests for DTC P0234
Help Request Posted
2007 Audi A4 Quattro 2.0L Hesitation, Surge, Cuts out VIN: WAUDF78E17
P0234: Turbo overboost condition. ... boosts up to about 15 psi than turbo pressure drops to 5 psi or less, its difficult to keep the turbo engaged. We originally checked (and replaced the recirculation valve, no help. We replaced entire turbo assembly-no help.It has P0234 overboost condition....
September 03, 2013