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2005
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Grand Prix Base
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - 3.8L - DTC P1112 To DTC P2431
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DTC P1640: Control Module Output A Circuit
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Conditions for Setting the DTC
Conditions for Setting the DTC
The ODM has detected a voltage greater than 33 volts.
OR
Excessive current is detected on any circuit to the ODM.
The conditions are present for at least 30 seconds.