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How can you fix code 43 on 1987 Chevy truck?

Anonymous

∙ 17y ago

Updated: 10/24/2022

Code 43 = Electeroic Spark Timing (EST) circuit low voltage detected

ESC circuit problems.

Without being there to put a meter on different components and check it out, all I can do is point you to the electronic spark control module.

Wiki User

∙ 17y ago

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