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P0234 Diagnostic Trouble Code Discussion for January 2007

Turbocharger Engine Overboost

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Trouble Ticket Help Requests for DTC P0234
Help Request Posted
2001 Volvo S40 1.9L Excessive Emissions, MIL Lamp on VIN: YV1VS29501
P0234: turbo charger overboost condition. ... above code:P0172, P0234, P0139 & P0101. Apparently this car is running rich. Removed all 4 spark plugs, has slight carbon build-up, scanned data everyth...
January 07, 2007