dash warning lights on 2008 Ford Mustang GT

A wrench symbol just appeared on my dash??? what is it?

Asked by for the 2008 Ford Mustang GT
With due deference to Roy, the wrench light is actually not associated with mainteance on a Ford. It is an indicator of a powertrain issue - in this case, a throttle control issue with the drive-by-wire electronic throttle control. A diagnosis must be performed to determine if a throttle sensor is faulty or perhaps the throttle body itself.
1 more answer
time for service. oil change and filter. it can be reset by the tech after the service.