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Porsche
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2003
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911 Carrera 4S, Standard
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Repair and Diagnosis
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Accessories & Equipment
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Entertainment Systems
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Radio, Navigation & Pcm Diagnosis - 911 CARRERA (996)
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System N 01
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Fault overview
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Test point 6
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Fault code 25
Fault code 25
Signal, reverse gear-navigation unit, Signal implausible