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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System & Fuel System - 5.3L - DTC P0420 To DTC P3449) >> DTC P0685, P0689, or P0690 >> DTC Descriptors

DTC Descriptors

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DTC P0685

Engine Controls Ignition Relay Control Circuit

DTC P0689

Engine Controls Relay Feedback Circuit Low Voltage

DTC P0690

Engine Controls Relay Feedback Circuit High Voltage

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