Hi All,
I have a 2004 Vibe, base model that all of a sudden started sputtering last night flashing SES light and quit. It restarted and smoothed out after a while and when I got home I checked the codes, showing P0420 which is a generic code "Catalyst System Efficiency Below Threshold (Bank 1)". Any more info or ideas as to what this could be? This has been a very trouble-free car until now (76,000 kms).
Thanks.. Snoopy