Why does the door ajar light flash intermittently

Hello, one of the switches on your door latches may be intermittently sticking, or have a wiring problem. One of your doors could also be out of adjustment, causing the sensor to sometimes think the door is open. First, testing is needed to determine which door is causing the light to come on. A diagnostic tool that can read the body controls and functions and the data from those functions will help you determine that. Then, you know which door to look at for resolution. Alternatively, some lubricant can be sprayed into each door latch in the hopes of loosening anything that is stuck that might be contributing to this failure. Since your light is flashing, it's less likely to be "sticking" and more likely to be related to a wiring concern or adjustment issue, or perhaps an intermittent sensor concern.