we are diagnosing a 2000 NB using a ross-tech diagnostic software. there are several fault code appears and we are able to clear it except for the airbag (which we are hesitant to do, due to the warning from ross tech) and one engine fault code decribe as "Engine Incorrectly coded." we try clearing the said fault but it will return in a few seconds. any idea how we can clear the code? how about the airbag wherein the indicator is always turned on. BTW, the NB is automatic and has a new ECU.