Ford Focus air bag light flashing then staying on

I think its telling you a fault code, something like this. These codes are for a mondeo, focus might be similar.

Codes
Number denotes number of flashes


1 - One flash cycle: Driver air bag module squib resistance out of range


2 - Two flash cycle: Passenger air bag module squib resistance out of range


3 - Three flash cycle: Short to battery plus or ground in section of air bag squib circuit common to both driver and passenger air bag modules


4 - Four flash cycle: Safety belt buckle pretensioner(s) failure. Short to battery plus or ground in safety belt buckle pretensioner circuit(s)


5 - Five flash cycle: Driver side air bag module or circuits failure


6 - Six flash cycle: Passenger side air bag module or circuits failure


7 - Seven flash cycle: Driver side impact sensor or circuits failure


8 - Eight flash cycle: Passenger side impact sensor or circuits failure

If it's code 33 check this ,

DTC B2292 Error value 31: Driver safety belt pretensioner circuit low resistance. Lamp flash code: 33
Possible Source(s):

Circuit(s).
Driver safety belt pretensioner.
DTC B2292 Error value 30: Driver safety belt pretensioner open circuit. Lamp flash code: 33
Possible Source(s):

Circuit(s).
Driver safety belt pretensioner.
DTC B2292 Error value 29: Driver safety belt pretensioner short to battery. Lamp flash code: 33
Possible Source(s):

Circuit(s).
DTC B2292 Error value 28: Driver safety belt pretensioner short to ground. Lamp flash code: 33
Possible Source(s):

Circuit(s).
Driver safety belt pretensioner.

Could check all connections under front seats .

Thanks for your answers guys,much appreciated, but since posting this fault it seems it has reverted back to normal! Should i be even more worried or is it just one of those things?.