Can the vacume lines to the Auto Hubs 4x4 cause the yellow check engine light to come on?
My auto hubs on my 1999 Ford Ranger 4.0 XLT went down on a hunting trip on an icy hard pack road and left me stranded at night. I did research and found out that they were not good auto hubs, only lasted 2.5 years on the line, and were replaced in mid 2000. Since I only use the truck for hunting and fishing I went with rugged ridge manual hubs. Way cheaper and made sense for what life the vehicle probably has left. After the switch the yellow/amber check engine light came on solid. it was not on prior to the swap out.
I wouldn't think so, have the codes pulled and see what they say and repost them back here, someone will help you with further diagnosis
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