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Porsche
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1999
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911 Carrera Coupe (996) F6-3.4L
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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P Code Charts
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P0603
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ECM Faulty
ECM Faulty
P0603
ECM Faulty
NOTE:
These faults are faults in the DME control module. If these faults occur, the DME control module must be replaced.