engine light off/on, dealer has replaced a lot of parts on 2000 Acura RL

engine light coming on/off for over a year. oxygen sensors, hoses, thermometer,radiator,water pump,timing belt,etc replaced. no loss of power, car running fine, last thing would be to replace would be catalytic converter, does this sound like a catalytic converter?

2 answers
First off you need to get the Diagnostic Trouble Codes that triggered the Check Engine Light.
what is your code or codes