what would cause this code p0420 come on

Asked by benny1985 Apr 04, 2016 at 08:51 AM about the 2010 Kia Rio LX

Question type: Maintenance & Repair

would like to get some advise on this code p0420 so i can get the car fixed
plaese and thank you

1 Answer
17,465

crumbob answered 8 years ago

Catalyst System Efficiency Below Threshold (Bank1) here is a page that might be of some helphttp://www.autocodes.com/p0420_nissan.html

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