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Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Controls And Fuel - 3.5L - DTC P0341 Through DTC P2544) >> DTC P0685, P0689, P0690, or P1682 >> Conditions for Setting the DTC >> P1682

Conditions for Setting the DTC: P1682

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The ECM detects that the voltage level difference is greater than 3 V between the 2 ignition voltage circuits for less than 1 s.