I get very high knock at the top of third on very cold nights... Unlike you, I'm CERTAIN it's knock cause it reads Knk: 140 !!!
There are 3 reasons your engine light will flash:
1. Knock above 60 (I think it was 60)
2. Maxing out the injectors
3. Maxing out the AFM
Most tuners will turn 2 and 3 off if they are sure that they won't be causing a problem for you. What injectors and what AFM are you running?
Also, you should really invest in a hand controller, they can show you an amazing amount of information!