My locker indicator has started flashing while driving in the highway.
i have potties my lockers 76k miles ago. No issues till now. No error light. Flashes I hit the unlock button it says locker unlocked then starts flashing again
The same happened to my 21 with 30k miles last year. No errors, just the darn flashing light on its own but the locker wasn't actually engaging. It was in the dealership 3 times for the same thing. The first time they replaced the sensor, the second time another sensor and another item that I cannot recall. Last time they stated I had a wiring issue in the rear axle and replaced the rear axle which finally resolved the issue. Good luck and keep us posted.
Mine was doing the same thing for months. Long story short, and perhaps a complete coincidence, but I recently changed my main battery due to a very, very slight slow crank condition and the locker light issue has not come back.