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Saturn
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2006
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Relay 3.9 1, AWD
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - 3.9L - DTC P0010 To DTC P0420
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DTC P0420
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Circuit/System Verification
Circuit/System Verification
Operate the vehicle within the Conditions for Running the DTC.
If the DTC fails this key cycle, proceed with Circuit/System Testing.