The first thing that comes to mind is a weak battery, I would remove it and have it load tested at the auto parts store, if the battery is okay let's run the codes by doing a CAN scan which will go over the BCM which the door locks run through and can cause the engine not to start. Can I ask when the engine will not start is the security light flashing? You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.
Here is a video to show you how:
https://youtu.be/u-4syLc-ifQ
Here is the body control module location which I would check the electrical connections for corrosion, and if there is none and you have codes for it, I would get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know what happens.
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Monday, August 26th, 2024 AT 6:17 PM