Hey fellas im havin an issue wth my teg recently the cel has been popping on while driving around and when I go to pull the code the cel goes off and doesnt flash any codes...the only work ive done to the car recently is replace the heater core....all sensors were plugged in...im just lost on where to even look due to the fact im not gettning codes is there any reason this could be happening? Car is tuned on hondata s200

 

If this were an original ECM, this would be a sign of a bad ECM.