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Chevrolet
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2004
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Optra Base, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - 1.4L DOHC - DTC P1402 To DTC P1661
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DTC P1660
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Conditions for Running the DTC
Conditions for Running the DTC
The ignition is ON or the engine is operating.
The ignition 1 voltage is more than 10 volts.
DTC P1660 runs continuously once the above conditions are met.