2007 Nissan Quest catalytic converter

I have a 2007 Nissan quest with 121000 miles got in a accident last year car hit me in back vehicle had a oil leak got this repaired, had the brake and battery light came on battery and alternator were replaced last year had the alternator replaced again lights are out, now check engine light came on had a mechanic check and fixed check engine light on again mechanic stated possible catalytic converter

Hi Sherri. Seems you’ve had a number of issues since the accident. Was there something you were wanting help with?

You’ll need to post the diagnostic codes for the folks here to be able to help. There normally wouldn’t be any relationship between the alternator replacement and the cat, so I expect that’s just a coincidence. Are you getting a p0420?

For want of a period…