What causes code b1318 2003 ford focus

I don't know what circuit was covered by fuse 18 , I don't have the owner's manual , and was unable to find out online . I did take the battery and have it load tested , found one bad cell . Upon further reading I came across a UK Focus site that stated that P1000 would appear when there is a problem with #2 coil . I replaced the battery and coil pack and upon starting the battery light went out , the car started , and ran smooth .

no,that's not what that means!but if you fixed it by changing the coil,then good deal.P1000 FORD - On Board Diagnostic System Readiness Test Not Complete...Possible causes - The vehicle is new from the factory. - Battery or Powertrain Control Module (PCM) had recently been disconnected. - An OBD monitor failure occurred before completion of an OBD drive cycle. - PCM Detected Trouble Codes (DTC) have recently been cleared with a scan tool...This code just means that the PCM didn't complete a full diagnose cycle, and is set when the battery have been disconnected, codes have been cleared or sometimes even when the vehicle have been towed. No scanner it's necessary to clear the code, driving the vehicle for a few minutes (sometimes more) to complete the diagnose cycle will clear the code. Clearing the code will reset the light unless other codes present...If DTC P1000 is triggered after DTCs have been cleared, all engine management OBD diagnostic monitor drive cycles have not been cleared...The On Board Diagnostic (OBD) monitors are performed during the OBD Drive Cycle. P1000 is stored in continuous memory if any of the OBD monitors do not carry out their full diagnostic check.