1991 Buick Regal codes

1991 BUICK REGAL
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KSSPERANZA
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1991 Buick Regal 6 cyl Front Wheel Drive Automatic

what are trouble codes 12 & 35 please help
Jan 27, 2009 at 7:25 PM
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DON OLIVER
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generic codes 12 is camshaft timing retarded. code 35 is turbo bypass valve control circuit high
Jan 27, 2009 at 7:39 PM