Hmmm - well, the points that rifter brought up are valid. Have you noticed anything else is up with the car (hesitation, loss of power, etc)??? My last Mustang would not throw a CEL because the damn light was burnt out! I'm sure you have reset the computer but if you haven't, try that. But for sure either get a code reader and either check it out yourself or have them checked for you (but if you do this, do not reset the computer first, or you will lose them). Good luck!
