Flashing CEL above 5k rpm

[klik]

What could be the problem here? I just change the sparkplug in my ep and when i shift at higher rpm like above 5k the CEL flashes? I have kpro and rsx s exhaust. I had a p0420 code before kpro that i cleared could this be a problem? thanks guys

[AKEP]

p420 is bad primary 02 sensor. look in kpro and see if your AFR is operational. flashing CEL is knocks so you need to either get it tuned out or not run the low/high octane map if thats what you loaded.

[Ba82Ep3]

What he said... and try that bolt on KAL for the a3 in the tuning section i added. The Hondata map sucks IMO.

[rds]

Probaby bad O2 sensor burned up both of mine running test pipe and no Kpro. If the map your running is advanced but wideband is readin wrong my be leaning out. Check A/F and any one correct me if im wrong but could the pugs be to hot.

[klik]

I think it could be the plugs because when i was running the stock plugfs they were alright, i put a rsx S spec ones since autozone did not have the ep spark plugs at the time. Ill just load the stock kpro map then, i need it anyways i have to smog the car this monday.