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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls And Fuel - 4.6L - DTC P0351 To DTC P2440) >> DTC P0685 or P0690 >> Repair Procedures

Repair Procedures

WARNING: This page is about a different variant/trim than selected.

Perform the Diagnostic Repair Verification after completing the repair.

  1. Refer to Control Module References for ECM replacement, setup, and programming.
  2. Clear the DTCs with a scan tool.
  3. Turn OFF the ignition for 30 seconds.
  4. Start the engine. If engine does not run, refer to Engine Cranks but Does Not Run .
  5. If other DTCs are set, refer to Diagnostic System Check - Vehicle .
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