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What is a protection board and why is it fitted when the original chip has none?

April 26, 2017chip fitted original

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What is a protection board and why is it fitted when the original chip has none?

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A protection board is used often when a physical chip change is made. This unit protects the chip vendor from fraudulent copying of the modified chip by scrambling the data. If the modified chip is fitted without the PB the engine will not start.