Does the lamp flash or just come on and stay on ? Could i get your vin # XXXXX would like to check the warranty history on your car ?
Ok I do have some positive information for you, typically the warranty on safety items covers beyond the base 3year/ 36000 usually i believe it is at least 5year/ 50000 miles. So this is good news for you. Unfortunately your system needs scanned with a scan tool to retrieve the codes that are turning on the lamp, this will give us a diagnostic path to follow. Once the codes are retrieved and the failure determined then we can check the warranty coverage for certain on the failed component. There are some common wiring chaffing issues on the focus but no other common restraint failures. I would advise contacting the dealer and ask them about the coverage . You will likely need to commit to a diagnostic charge if indeed the fault is not a covered component.