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Porsche 928 Problems

Central warning system erratic due to electrical interference on Porsche 928

Problem Description and Possible Solution

Due to electrical interference from cell phones and secondary ignition faults, the vehicle's central warning system display can be erratic.
(5 people reported this problem)

Porsche 928 Vehicles With This Problem

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Average mileage: (–)
5 model years affected: 1990, 1991, 1993, 1994, more1995
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Brake problem? Or maybe a faulty head gasket cylinder?
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