Will a car´s computer lose its program when the battery dies?

9 Answers

Relevance
  • 7 years ago
    Favorite Answer

    No. It will need to relearn the idle speed but the programing stays. If you don't go to the dealer you may miss important updates that most manufacturers have which take a few minutes. Open recalls are done for free.

    Source(s): Mitsubishi Master Tech
  • ?
    Lv 7
    7 years ago

    The PROGRAM, NO ! the settings and last used info, yes, You can check any Check engine lites by disconnecting the batt for 10 seconds, if it comes back you DO have a problem. BEST if done at NOON/ midnight, the clock resets to 12:00.

  • laslo
    Lv 7
    7 years ago

    No it will not. That would be a very bad design. You may lose, briefly, some minor data related to shifting, or radio programming or seat positions, etc. The engine can relearn most of this, but other stuff might have to be reprogrammed by the driver.

  • 7 years ago

    The computer loses info and then whent the battery is back up it tends to reset itself and adjust the settings after everything is running normal again.

  • How do you think about the answers? You can sign in to vote the answer.
  • 7 years ago

    NO but the radio will loose it's set channels. Your first two answers came form another pair of Yahoo non-mechanics who never changed a battery in a car.

  • 7 years ago

    Yes. Its the power from the battery that keeps the computer 'in tune' to your car.

    Dead battery and the computer loses its set programme.

    when the battery is recharged the computer can be reset by submitting the correct code.

  • 7 years ago

    theBax says it correctly. You do not lose any ecu program. You do have to drive it a bit for it to relearn your driving. And any Check Engine Codes will be cleared (except for hard codes).

    Source(s): ASE auto/diesel technician
  • hb12
    Lv 7
    7 years ago

    No, but jump starting and putting the cables on the wrong terminals can cause a problem.

  • Anonymous
    7 years ago

    yes

Still have questions? Get your answers by asking now.