Jiffy Lube cleaned fuel injectors on my 2005 Focus, now the emission light is on!

I should have known better, but I let Jiffy Lube talk me into doing a $60 fuel injector cleaning on my 2005 Ford Focus, which has about
26,000 miles on it.
Immediately after, the OBS-II "emissions" light came on and stayed on. Any ideas or suggestions? Do I have to sue Jiffy Lube now?
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