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Hello. Welcome ot Just Answer. Please allow me to assist you. When we see this issue in the shop, it is usually one of these issues.
1) The door switch is not closing far enough to cause the door switch to close
2) the door switch is faulty
3) the door switch is inside the door latch and is faulty.
The first thing to do here is to close all of the doors. While observing the door ajar light, press in on each door below the door handle area. See if the light blinks off for a second. If it does, that particular door is the issue. Investigate the door switch further.