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What is a Code 42 on a 1992 S-10 Blazer?

Anonymous

∙ 21y ago

Updated: 9/11/2023

Greetings, A code 42 indicates that the electronic spark timing bypass circuit or the electronic spark timing circuit is either open or shorted. A malfunctioning HEI module can cause this.

Wiki User

∙ 21y ago

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