Question about 2005 Ford Mustang
The wrench light is NOT the check engine light! It is a failsafe warning light and usually when it comes on there is a problem with the "fly by wire" throttle. The wrench light will not be caused by leaving the gas cap loose. You could try disconnecting the battery for a few minutes then reconnecting. If this is no help you have no other choice but to take it in for service.
I am a fellow Mustang owner, 2008 Bullitt Mustang.
Posted on Oct 23, 2009
That is your check engine light. go to any auto parts store and they will help you scan it free of charge. Or you can take it to Ford and they will charge you $100. ON a car that new, you probably didnt get your gas cap on good. Did you just fill up with gas?
Posted on Oct 03, 2009
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Posted on Jan 02, 2017
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