I Was driving My 2006 f250 home noticed the wrench icon was illuminated on my dash pulled into the driveway shut it off turned the truck back on no light took it for a drive light came back on. Tried pulling codes with my sct tuner nothing would come up. My eot vs ect was only max 9 degrees apart seems no loss of power. I just did fuel filters and a blue spring upgrade the check engine light does not come on just the wrench icon could it be something with transmission. I hate taking anything to the dealership but maybe there computer can pull something up.