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A lot of codes are coming back "Bank 1". What does that mean? Is that a particular connection to the ECU?

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I have a lot of codes coming up from a diagnostic check. Most of them are followed by a "Bank 1" which I assume is a reference to a particular connection to a harness or something. Could this be clarified for me please?

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Here is the information about what bank means: https://www.autocodes.com/articles/what-is-bank-one-and-bank-two.php

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