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Pontiac
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2001
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Firebird Base, 2D Convertible, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System Self-Diagnostics - 3.8L
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Diagnostic Tests
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DTC P0604: Pcm Internal Malfunction
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Code Enable Criteria
Code Enable Criteria
For DTC to run, ignition switch must be ON for 5 seconds with ignition voltage more than 10 volts.