Good morning,
This code is mostly for low voltage. You need to be sure the battery is at 12.6 volts. Every week, you should run the car so the battery does not go down.
2 weeks is about the limit for a battery for an unused car.
I attached some information for you below.
As far as the Airbag, please start a new question as we can deal with one issue at a time per question.
Roy
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Thursday, October 8th, 2020 AT 8:29 AM