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Key System error is a very common
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dashboard warning on Nissan Altima and
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other models but what causes this
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warning light to pop up let's find out
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the most often reason for Key System
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error on Nissan due to a disconnected or
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loose hood latch connector check the
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hood latch connector it's easy and you
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can do it yourself if the error is
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indeed related to a disconnected or
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loose connector the solution is simple
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make sure the hood latch connector is
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correctly connected and secure
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next the Key System error message in
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Nissan Altima often pops up when the car
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battery is weak to fix this replace the
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car battery especially if it's the
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original or 3 to four years old when
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changing disconnect the battery for 15
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to 20 minutes before connecting the new
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one now the error message caused by a
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faulty key faab your car first you
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should check whether the battery of the
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key fob is healthy or not if not then
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change the battery of the key fob if the
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fob battery is okay and if you think the
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key fob itself is the issue then replace
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the faulty key fob finally if you found
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a fault ECU is causing the issue a
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practical solution is to replace it you
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can get a used ECU online after
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installing the new ECU needs
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professional programming and sensing
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with the car systems a task usually done
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by a dealer or a qualified
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technician I am trying to help I am not
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asking for any subscription still if you
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do subscribe that means you also have
