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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Radio, Navigation & Pcm Diagnosis - 911 CARRERA (996) >> System N 01 >> Fault overview >> Test point 2 >> Fault code 21

Fault code 21

Data lead, navigation unit-PCM, Open circuit/short to ground, Short to B+, Signal disturbance

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