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Usually, disconnecting the battery cable is what resets your car's computer(s) ... typically reverting to "default" settings and (sometimes) clearing any trouble codes.

Generally, there's no need to do anything after you've reconnected the battery. Some cars have "learning" modes that adjust various settings based on your driving style, and it might take some time for the computer to re-learn everything. But there shouldn't be a big difference.

A few cars have language display settings (German/English, for example) that "toggle" from one to the other each time the battery is disconnected. The owner's manual should explain how this works.

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15y ago

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