Code 11 help!

[MikeAttakNYC]

My Apex ran fine all day then we stopped for dinner it sat out in the cold and then when I went to start it it would not turn over. The dash was flashing the engine light and it said error code 11. Any help?? Thanks

 

[70superbee]

It is Cylinder identification sensor and it will not start.

 

[MikeAttakNYC]

Any thoughts on how to fix this?