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Home >> Saturn >> 2002 >> SC2 Automatic, MP6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0509: Idle Control System Circuit High >> DTC Parameters

DTC Parameters

DTC sets when either IAC valve coil "A" or "B" is commanded on and off and voltage on one side of coil circuit is high (ignition voltage) when it should be low (grounded). An open or short to voltage will also set this DTC.

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