I got the notorious 4wd light, happend one cold morning noticed the low tire pressure light came on at the same time. I restarted the car and the light stayed off until I started to move forward. Fluid is good. The pump it’s self seems to be in good shape.

I was able to pull some codes after driving it for a bit.

 

https://www.evolutionm.net/forums/ev...on-issued.html

Year and mileage of the car? Mine went out at about 55k miles. Had it replaced under warranty.