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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 151 (Engine Control System - 3.8L - DTC P0451 To DTC P2120) >> DTC P0685 >> Repair Procedures

Repair Procedures

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine. If engine does not run, refer to Engine Cranks but Does Not Run .
  4. If other DTCs are set, refer to Diagnostic System Check - Vehicle .
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