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What does a code 302 indicate on 2003 Chevrolet trailblazer.?

A code 302 on a 2003 Chevrolet Trailblazer indicates a problem with the fuel injector circuit on bank 1.

Bank 1 refers to the side of the engine that contains cylinder #1. The code means the PCM (Powertrain Control Module) has detected a malfunction in the electrical circuit supplying power or ground to one or more fuel injectors on that bank. This could be due to a faulty injector, wiring issue, connector problem, or a problem with the PCM itself.

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