Diff lock light on / ABS ON

Hey guys I have 2000 limited 4runner . Ran into a problem where I was driving normally and my diff lock light began to turn on . Then off and soon it came on for good as well as later my abs light turning on as well . I never engaged my diff lock . And I was in 2wd . Also I just then engaged in 4Low and turned on my diff and it engaged properly and then I disengaged it and put it back into 2H . My lights turned off but after about a gas tank it pops back up and just stays on with the abs light ? Can anyone help me out . When the light is on it’s just the light and nothing else is engaged .

 

Did you ever find the solution to this issue? I'm having the exact same issue on my 2000 4runner limited.