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Home >> Buick >> 2008 >> Lucerne Super >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.6L - DTC P0340 To DTC P2138 >> DTC P0685 or P0690 >> DTC Descriptors

DTC Descriptors

DTC P0685

Engine Controls Ignition Relay Control Circuit

DTC P0690

Engine Controls Ignition Relay Feedback Circuit High Voltage

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