This morning I was driving and my tach flashed red .then I noticed my check engine light came on . Any ideas ? Car seems to run great .

 

did you hit redline when the tach light up?

 

yes it appears I hit redline

 

I have seen some other posts with similar situation; apparently when you hit the rev limiter, it cuts ignition which causes a temporary misfire, and the computer sees that as a problem and triggers the Check Engine Light (CEL) .... I think it will go away by itself, if it does not go away, you might need to reboot the system by disconnecting the battery for a while

 

If uncomfortable using the machine my experience is that many Auto Stores, Wallwork, Auto Zone etc will read the codes for free. The shop I use never charges to read a trouble code. That is my experience.