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The 1b actually means use table 18. you will see it everytime you plug in. From table 18 I get that c7 is a miss on cylinder #4. right side of car closest to the firewall. The fact it was gone when you rebooted the engine points to coil,but it could be plugs or injectors or even something else, but start with the basics. Clear the code and wait and see if it happens again and in the same way. Next step would be an inspection and likely choice would be switch the location of the #1 coil and #4 coil for each other. If you don't know the condition of the plugs change them at the same time. If they are newish you still need to pull the plug on the offending cyl and inspect.Number the old and take a picture of them and post. Few guys here that can see lots in someones plugs.
Wait and see where it comes back if at all. If it comes back in the same place, then you move to fuel. That should keep you busy for a while. best of luck.
Wait and see where it comes back if at all. If it comes back in the same place, then you move to fuel. That should keep you busy for a while. best of luck.