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Peace be upon you all: It seems that some people have been confused. Or I did not explain well the matter of changing the battery. Some cars lose the current programming for some important things when changing the battery, such as the gas pedal or throttle. The car starts to turn off when you lift your foot off the pedal, and this may take a while to return to work as it was. The reason for this is the presence of carbon or dirt on the throttle. How? When you disconnect the battery, the programming coordinates return to the base. Meaning, when the pedal was clean and new as if it were from the factory. The throttle is open at about 2%. But with time, dirt accumulates on it and the computer adjusts this over time and gradually to become 3 or 4%. When the battery is disconnected, it returns to 2%, but because of the dirt, the engine does not work well. So it takes longer to get used to the presence of dirt. Some cars, as I mentioned, the ABS or Air Bag light comes on and the code needs to be re-cleared. What I mean is that the programming is not damaged, but it needs to be rehabilitated in some cases. This is why some workshops or battery replacement shops keep the engine running when changing the battery so that they do not have to argue with the customer if the engine turns off because they do not have the equipment to correct that.