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2003
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Corvette Base, 2D Convertible, Standard
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Diagnostic Tests
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DTC P1638: Pulse Width Modulation Signal Out Of Range
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Conditions For Clearing DTC
Conditions For Clearing DTC
The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The DTC can be cleared by using the scan tool Clear DTC Information function.