Q. Does disconnecting the car’s battery overnight reset the the car’s computer, therefore readjusting its performance the next time you drive it?
14:4213 January 2011
For example, will taking off aggressively give it more bottom-end power, etc?
A. It depends on the car's age and type of ECU used. On some older cars, disconnecting the battery will reset the system but in most new cars it does nothing, except potentially reset the clock and radio station presets.
If you take off aggressively in a modern car, the ECU will automatically adjust everything as best it can according to the conditions, including air temperature, engine temperature and fuel being used.
Some ECUs have "adaptive learn" features for auto transmissions. If they detect a pattern of aggressive driving they alter gear-shift points and can sharpen throttle responses.
Q&A: Will disconnecting the car’s battery reset the computer?
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